help VC++ Activex into Csharp

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  - 1
    - adding a blank to a ComboBox How do you add a blank to the top of a comboBox in a Windows Form? I've done this with drop down lists in web forms but the ListItem that I used there doesn't appear to exist in a win form. I'm loading the ddlCategory comboBox with an ID(int) for value and Category(string) for Display out of a SQL DB using a SP. Once these values are loaded I want to add a blank to the top of the list and have it be selected initially. What I've tried gives me an error of "Items collection cannot be modified when the DataSource property is set." private void LoadCategory() { // Load the Source DDL ExpenseSpreadSheet.ExpenseClass.ExpenseClass getCategory = new ExpenseSpreadSheet.ExpenseClass.ExpenseClass(); System.Data.DataSet ds; ds = getCategory.GetCategory(); DataTable dt = ds.Tables[0]; ddlCategory.DataSource = ds.Tables[0]; ddlCategory.DisplayMember = "Category"; ddlCategory.ValueMember = "id"; // I have been trying to do this to add the blank. ddlCategory.Items.Add(" "); } Thanks, Matt Tag: help VC++ Activex into Csharp Tag: 108300
  - 2
    - RichTextBox resizing hi, In am panel, i'm docking several (10-50) RichTextBoxes to the Top. Now i only want to see one Scrollbar, the one of the panel. Not the ones of the RichtTextBoxes. Each RichTextBoxes has got a different long text inside. How can i adjust them to the text? The panel can be resized, but i don't know, if i somehow can "calculate" the lines i need in each RichTextBox and resize it? I can't count the characters, because of the RTF the may have a size of 10 or 32. thx Tag: help VC++ Activex into Csharp Tag: 108297
  - 3
    - Animated Gif not working on new machine Hi all! Our application has a wait dialog that has an animated gif on it that periodically gets shown from a separate thread while the application does some processing on the main thread. We've worked out all of the kinks with this (or so we thought), but just installed to a new laptop and the gif is not animating. This new machine is an Itronix GoBook XR1 (IX270) with an Intel Core Duo CPU T2400@1.83GHZ processor. The exact same release works on all of our other machines. Any ideas? Thanks in advance for any help you can provide! karlag92 Tag: help VC++ Activex into Csharp Tag: 108294
  - 4
    - Tooltips on a textbox What is required to enable a tooltip on a textbox? Tag: help VC++ Activex into Csharp Tag: 108289
  - 5
    - Newbie - Getting form data to "refresh" I am new to WinForms developing - used Access for many years. I have an application using DataSets from Stored Procedures in SQL Server. When users enter new data and click the Save button I can save the record fine by using another SP. But, I want the ID field to update with the new ID for that record. What can I call to make the DataSet update and display the new ID number for the record? Thanks for any help. Tag: help VC++ Activex into Csharp Tag: 108288
  - 6
    - Using lock to synchronize agent event with main UI thread... Hi all, We're doing an application in which a background agent is polling asynchronously for data and doing some work. When having new data it throws an event. A method is wired to the event, uses Invoke for updating selected datagrids etc. However, sometimes, the user is doing work (like executing a save method at the same time), and we want to postpone the redraw of the datagrids, or delay users input a little until updating is completed. All in all, we want to "syncronize" the events regarding updating and workm and what is shown. I may be misunderstanding the use of the lock statement, but basicaly the logic behind the code below is that if a lock statement is entered using the thelock object, other lock statments using the same object are put in "queue" and waits until the previous lock statement is exited. The code below is a form with two buttons. The first button starts a thread, simulating the agent throwing the event. The eventhandler uses Invoke to invoke Cross. The Cross method does some work (not a all near 15 seconds in real life, this is for show only). While entering and working (before the 15 seconds have past), the second button is pressed. I would expect the second buttons event handler to wait at the lock statement until the Cross method releases it, but I get this result: 15:31:58: Cross entering lock 15:31:58: Cross entered lock 15:31:59: Button2 entering lock 15:31:59: Button2 entered lock 15:32:00: Button2 exited lock 15:32:14: Cross exited lock My expected result would be: Cross entering lock Cross entered lock Cross exited lock Button2 entering lock Button2 entered lock Button2 exited lock or vice versa, regarding whoever comes first... but not mixed... After some testing I'm wondering if this is only valid as an idea. Is this the right way to do what I want? Am I misunderstanding the lock (is the lock only usable on the same code, not scattered locks in several methods? I have however seen property accessors that uses the same lock object, so...) PS. The while statement with sleep and DoEvents might also be wrong for simulating work while still being able to take input from the user. Maybe the example is done wrong, and the methods actually would be synchronized in a real situation? You're welcome to answer me in hard technical terms, I'm just fairly new to threaded windows programming... Thanks in advance! Christer public partial class Form1 : Form { private object thelock; public Form1() { thelock = new object(); InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { //Start worker thread ThreadStart ts = new ThreadStart(ThreadWork); Thread thread = new Thread(ts); thread.Start(); } private void button2_Click(object sender, EventArgs e) { Debug.Write(DateTime.Now.ToLongTimeString() + ": Button2 entering lock" + Environment.NewLine); lock (thelock) { Debug.Write(DateTime.Now.ToLongTimeString() + ": Button2 entered lock" + Environment.NewLine); MessageBox.Show("Button executed"); } Debug.Write(DateTime.Now.ToLongTimeString() + ": Button2 exited lock" + Environment.NewLine); } private void ThreadWork() { this.Invoke(new MethodInvoker(Cross)); } private void Cross() { Debug.Write(DateTime.Now.ToLongTimeString() + ": Cross entering lock" + Environment.NewLine); lock (thelock) { Debug.Write(DateTime.Now.ToLongTimeString() + ": Cross entered lock" + Environment.NewLine); DateTime seconds15 = DateTime.Now.AddSeconds(15); //Wait 15 seconds... while (DateTime.Now < seconds15) { Thread.Sleep(15); Application.DoEvents(); } MessageBox.Show("Cross executed"); } Debug.Write(DateTime.Now.ToLongTimeString() + ": Cross exited lock" + Environment.NewLine); } } Tag: help VC++ Activex into Csharp Tag: 108286
  - 7
    - How to set a globalized value like Form1.Text in resources (VS2005 C#) Hello, In VS 2005 help, they told to use some code like this.Text = (string)resources.GetObject("Form1.Text"); to set the title for a Form, but there is nothing in my project's resource file corresponding to Form1.Text and even I can't add it in resource editor. How could I automatically generate them ? Thanks CS Tag: help VC++ Activex into Csharp Tag: 108283
  - 8
    - Event handling for input element (Using Visual Studio 2005 and C#) I'm trying to set up an event handler for trapping activity involving an input text element of a web page. I've tried using onclick, onenter, onactivate (see code snippet below), etc handlers but while they seem to be set successfully during my web page parsing, the specified methods never seem to get triggered: HTMLInputTextElementEvents2_Event inputTextElemEvt; IHTMLInputTextElement foo = (IHTMLInputTextElement)currElem; inputTextElemEvt = (HTMLInputTextElementEvents2_Event)foo; inputTextElemEvt.onactivate += new HTMLInputTextElementEvents2_onactivateEventHandler(inputTextElemEvt_onactivate); My event handling for HTML links, drop-down menus, etc which is implemented in a similar manner seems to work just fine. p.s. apologies in advance if this is not posted in the right section of the forums - if that's the case, please advise where should I migrate this post to. thanks Greg Tag: help VC++ Activex into Csharp Tag: 108279
  - 9
    - Dialogs like VS 2005 Add Item and Project Hi, looking for a few pointers about dialogs forms. I would like to have add new functionality in an app I am writing, so the user could add a number of different items, reports, questions etc, is there an easy way to create dialogs like the VS IDE Add Item and Add Project dialogs, or is this done through some sort of user control, specifically I would like to replicate the behaviour where the image of the item goes blue when the user clicks on it like VS IDE? I am a web developer trying to get to grips with windows forms stuff so any suggestions would be great. Cheers EJ Tag: help VC++ Activex into Csharp Tag: 108270
  - 10
    - Hide Tabpage I have a TabStipControl... How do I do to hide some tabpage programmaticaly ? tnx Tag: help VC++ Activex into Csharp Tag: 108266
  - 11
    - saving data with my .exe I have some data that I want to save inside my .exe instead of delivering it as separate files. When I was using MFC, I would create a custom resource in my .RC file, then use FindResource and LoadResource. What is the equivolent in .NET, or is there another way to achieve my goal? I created a custom resource in my app.rc file, just like I would have in MFC, but I have no idea how to do anything with it. What is the call to get that resource in a variable I can see? In other words, I'd like the equivolent of this routine: CString PutResourceInString(HINSTANCE hInstance, const TCHAR* szSection, UINT uiResource) { HRSRC hFound = ::FindResource(hInstance,MAKEINTRESOURCE(uiResource),TEXT(szSection)); HGLOBAL hRes = ::LoadResource(hInstance, hFound); int iSize = ::SizeofResource(hInstance, hFound); LPVOID lpBuff = ::LockResource(hRes); CString csRet; char* psz = csRet.GetBuffer(iSize+1); memcpy(psz, lpBuff, iSize); psz[iSize] = '\0'; csRet.ReleaseBuffer(); ::UnlockResource(hRes); ::FreeResource(hRes); csRet.Replace("\r\n", "\n"); return csRet; } Thanks! Tag: help VC++ Activex into Csharp Tag: 108264
  - 12
    - Slow redraw of controls when scrolling Hi all! I am running VS2005/,NET 2.0, and experience really slow performance on the refresh rate of GUI when scrolling my forms. To debug, I just created a clean UserControl and added about 50 empty textboxes to it, no databinding, and set the AutoScroll property to true. When scrolling, the screen is updated really slow, the textboxes are drawn partially, and blurr. CPU usage is 95-100%. Does anybode know why this happens? Best regards Anders Tag: help VC++ Activex into Csharp Tag: 108260
  - 13
    - ADV: / SPAM: Job Posting Assistance All, Sorry for this "off topic" post but you all are always so helpful. We are a small company headquartered in Dallas / Fort Worth with 5 servers, 2 sites, 25 workstations and a couple remote users. We are outgrowing my ability to keep up and the ability to keep up development on small projects. We are looking to hire a cross job type person. Here's what I am after... Someone that can focus on web and database application development. There would also be a need to for the general network maintenance of servers and user issues and questions, along with input the IT infrastructure of today and tomorrow. Where is the best place to begin a search for qualified candidates in the Dallas / Fort Worth, Texas area? Thanks, Brian Tag: help VC++ Activex into Csharp Tag: 108255
  - 14
    - Data grid hierarchal navigation I have hierarchal data grid that has parent and child tables linked via data relation. I would want the child row to be displayed with out having to click on the relation link the windows forms grid within the same grid. How can I achieve this? Thanks Tag: help VC++ Activex into Csharp Tag: 108254
  - 15
    - Launch IE with a complex string Hi I am working on integrating some help modules and i need to launch the browser with a url like X:/WebHelp_WithTOC/index.htm#mergedProjects/ProductA/ProductA_Form1.htm while i can have a form and a webBrwoser control in it and pass this as a URl, i want to specifially launch IE with this page. The standard System.Diagnostics.Process.Start(String filename) does not work in this case. The error is 'the specified file could not be found'. In this function it considers the entire string to be proper path for a file cos the string starts with X:. How can i launch this url in a new instance of IE? Thanks Tag: help VC++ Activex into Csharp Tag: 108252
  - 16
    - Textbox copy and paste problem I have create a very simple windows form application. I am using textbox control, but I am unable to copy and paste text into the textbox by using keyboard hot key. Anyone come across this problem before? Thanks Tag: help VC++ Activex into Csharp Tag: 108237
  - 17
    - Transparent ContextMenuStrip with non-transparent text Hi, I am trying to implement a context menu that is 50% transparent. Setting the opacity to 0.5 works but unfortunately the texts are also displayed with transparency which makes them very hard to read. Now I would like to draw the menu background with transparency but the text without. I have tried various approaches without success: - Implement a ToolstripRenderer: Draws a gray background despite overriding all overridable methods - Handle Paint event of each menu item: Text gets drawn with transparency Does anybody have an idea how to approach this? Thanks in advance, Hans Tag: help VC++ Activex into Csharp Tag: 108234
  - 18
    - Bug or bad design in System.Windows.Form.Form Hi While developing a Windows forms application I encountered what I consider to be a bug or a design flaw: Consider to have 3 Forms namely A B and C. B is owned by A and C is owned by B. If we close A, all three forms should close which is exactly the design described in the class library reference on msdn. However, if the windows run in NON modal mode (i.e. not showed using ShowDialog(IWin32Window), closing A does call the OnFormClosing on A and on B but NOT on C. C gets closed without a way to check for unsaved data, because the FormClosing event doesn't get raised. If window B and C run in Modal mode (ShowDialog(IWin32Window)), C raises the FormClosingEvent (from within the OnFormClosing Method), but setting e.cancle = false will NOT prevent the window from closing, and even worse, the OnFormClosing method will run AFTER the window has already been disposed. Possible Reason: The invaluable resource .NET Reflector gave me some insight to the Implementation of the System.Windows.Forms.Form class. When a window closes, it calls OnFormClosing on all of its MdiChildren and Owned Windows. If e.cancle does not evaluate to false after these calls, the form gets Disposed. Dispose(bool disposing) calls Dispose on all owned forms, and thus it works recursively. But OnFormClosing does NOT. So when I call A.Close() it "asks" B to close, and if B does not set e.cancle, A disposes itself which in turn disposes B and C. So C gets Disposed without a prior call to OnFormClosing and no event rising. Shouldn't the (private) WMClose method in System.Windows.Forms.Form call some RECURSIVE method to check recursively for all owner relationships if the owned forms (in all levels of the owner relationship) can close? Possible workaround: (NOT tested yet) override the OnFormClosing method that it calls OnFormClosing for all owned forms recursively. This however will cause the OnFormClosing method to be called twice for all owned forms that are directly owned by the "root" form, because WMClose calls OnFormClosing on all its directly owned forms, and later calls this.OnFormClosing. The loop which calls OnFormClosing for all owned forms shouldn't be in WMClose but rather in OnFormClosing itself, thus be recursive. For MdiWindows this problem does not exist, because MdiCild Relations can only exist in one level, so for MdiChildren this problem does not exist. But when one closes the MdiParent of an MdiChild which owns some window X, OnFormClosing and the FormClosing Event will NOT be called for X. Has anyone ever encountered problems with this behavior as I did? And how did you solve the problem? I would consider this behavior either a bug or a design flaw! Regards Stephan Tag: help VC++ Activex into Csharp Tag: 108232
  - 19
    - ControlDesigner OnMouseDragMove only called once? I am playing with overriding the ControlDesigner OnMouseDragMove. But for some reason it only appears to get called when a control just begins its drag. I was anticipating it to be called for every movement of the mouse during the drag. Am I missing something so that this method is only called once? Is there another method I should be using that will be called for each movement of the mouse? Tag: help VC++ Activex into Csharp Tag: 108231
  - 20
    - notification windows a la Outlook Hi all, I've been recently struggling to get to the bottom of this, but can't find the proper way to do this. I have a notification window, which may appear on screen when certain events are received. Currently the notes are created and displayed on the main form's gui thread. It works ok, until you go into 'modal' mode. That is, if there are a modal form and the note simultaneously on the screen, I cannot click on the notify window. There are two scenarios here: first the note pops up, then a modal window is opened; or the other way around: you receive the note while the modal window is on top. In both cases, I can't access the note. I looked at Outlook, how it behaves, and you can access the note (of course, trying to 'open' the email results in a warning message, stating it can't do that while modal windows are opened). I believe Outlook is using a different thread for the notes. I tried to do this, but it's not that easy. Notes must be _created_ (and displayed) on the 'notification thread'. Bottom line: I want to be able to create and display the notes from the gui thread, on the notes' thread (ideally I want only one thread for all notes, not one thread for each note). Any ideas are welcome. Thanks in advance, Cosmin. Tag: help VC++ Activex into Csharp Tag: 108227
  - 21
    - VB WinForms Application doesn't inherit from WindowsFormsApplicationBase Hi there, Just out of curiosity.... Looking into Application.designer.vb as part of MyProject i see Partial Friend Class MyApplication <Global.System.Diagnostics.DebuggerStepThroughAttribute()> _ Public Sub New() MyBase.New(Global.Microsoft.VisualBasic.ApplicationServices.AuthenticationMode.Windows) .. End Sub .. End Class how come this class class doesn't or should i say "where does this class" inherit from WindowsFormsApplicationBase? I can see thats its partial and that its calling mybase.new but wheres the rest? Ive looked into the directory using windows explorer but still cant find it. Is this part of the visual studio/ vb compiler hoo doo voodoo? thanks richard Tag: help VC++ Activex into Csharp Tag: 108215
  - 22
    - Print Dialog I need to programmically close a PrintDialog form after it is displayed with the "ShowDialog" method in case the user does not dismiss it himself. My app needs to have it time out. How can this be done ? Tag: help VC++ Activex into Csharp Tag: 108211
  - 23
    - SystemParametersInfo call hanging. Due to the nature of our application, it is necessary to set a system setting that increases the size of the scrollbars when the application is the "active" one. When it is not, the system setting is reverted so that the scrollbars appear in their normal size. To achieve this, I am overriding the WndProc method and checking if the message received is WM_ACTIVATEAPP, (this is the message received when the application gets focus). Upon receipt, I make a call a call to the user32.dll call SystemParametersInfo to make a change to the scrollbar size. This seems to work just fine, but when my application receives a SystemEvent.PowerModeChanged or SystemEvent.DisplaySettings event, my call to SystemParametersInfo (called via the WndProc override) seems to hang... and I can't figure out why. Does anyone have any ideas on why the call to SystemParametersInfo would hang? It requires the user to kill the application. Thanks, Tag: help VC++ Activex into Csharp Tag: 108210
  - 24
    - SystemParametersInfo call hanging. Due to the nature of our application, it is necessary to set a system setting that increases the size of the scrollbars when the application is the "active" one. When it is not, the system setting is reverted so that the scrollbars appear in their normal size. To achieve this, I am overriding the WndProc method and checking if the message received is WM_ACTIVATEAPP, (this is the message received when the application gets focus). Upon receipt, I make a call a call to the user32.dll call SystemParametersInfo to make a change to the scrollbar size. This seems to work just fine, but when my application receives a SystemEvent.PowerModeChanged or SystemEvent.DisplaySettings event, my call to SystemParametersInfo (called via the WndProc override) seems to hang... and I can't figure out why. Does anyone have any ideas on why the call to SystemParametersInfo would hang? It requires the user to kill the application. Thanks, Tag: help VC++ Activex into Csharp Tag: 108209
  - 25
    - ANN: TayLayout Release 00.00.15 for IronPython TayLayout Release 00.00.15 for IronPython http://code.google.com/p/taylayout/downloads/list New This Release * Wordsearch generator sample (80% functional) * More controls specially supported (listbox, webbrowser) * More compound controls * Controls can now be right-aligned * Plenty of bug fixes TayLayout is a more sophisticated version of the flow layout - you can add controls to a panel or form and it takes care of positioning them. Controls are added in a Left to Right order until you specify that a new line is required. More info available at http://docs.google.com/View?docid=dd59dk39_2jh3xf9 Thanks, Davy Mitchell Tag: help VC++ Activex into Csharp Tag: 108205
- Next
  - 1
    - Find the day of the Week I am currently writing a program in Visual Basic .NET and need to be able to find the day of the week when given the date (Ex. 1/20/07). Once the function is given the date it will the deliver the day such as Sunday, Monday, Tuesday and so on. Thank you very much. b89 Tag: help VC++ Activex into Csharp Tag: 108202
  - 2
    - Windows CBT Hooks (Help!) I hope you can answer a question. I am writing a poker utility that tracks what windows are open and displays information about opponents that are still playing and their previous history that is stored in a game DB. It is a very cool project with Pattern Recognition (Pixel Screen SCraping to OCR) and pretty advanced calculations. I just started writing my first prototype in C# and discovered that I could not set a System Wide CBT hook. .Net will not allow hooks CBT hooks to be set globally, period! Works for mouse and keyboard, but not CBT. I need to trap when a window is created, destroyed, gotfocus, or resized. I do not want to cancel or redirect those messages. I just need to get new rect information about the window. I have discovered ways of doing it in either VB6 or C++. I am not sure which is the best strategy to pursue. I do not code in either language. Can I have this hook in VB or C++ and then call my C# function? Anone have any suggestions for interacting in between managed and unmanaged code when the unmanaged code needs to trigger a C# method? Thanks, Andy Tag: help VC++ Activex into Csharp Tag: 108201
  - 3
    - ImageList performance problem Hi all, I'm experiencing performance problems when adding a large set of bitmaps to an ImageList. The bitmaps are 55x55 pixels in size, which matches the ImageList's ImageSize property. Adding approx. 5000 bitmaps takes about 1,5 minutes. The bitmaps are generated from scratch, resized and other things much faster than that (in just a few seconds) so why should adding them to an imagelist be so slow? The imagelist is also the source for a ListView, which displays the results. I've tried adding the bitmaps to the ImageList via Add(), AddRange() and using the async. virtual mode. The latter sounded promising, but didn't help. Any ideas, hints? Cheers, Johan Sj=F6str=F6m MSc, MCAD, MCTS, MCITP Tag: help VC++ Activex into Csharp Tag: 108199
  - 4
    - Where are the 'most often used program' shortcuts stored? Hi, I'm talking about the ones that are displayed in the XP Start menu? Does anyone know where they are/how to get a list of them. Cheers, James Randle. Tag: help VC++ Activex into Csharp Tag: 108197
  - 5
    - Reason for Application.ThreadExit Hi, We have the strange problem that sometime in our application Application.ThreadExit is raised and out application shutting down. We do not see any previous exceptions before this event fires. Moreover the Application.ThreadException event is not fired at all, so we have not unhandled exceptions that occurs. We are working with SQL-2005 and with some unmanaged code too. What can be the reason for such behaviour ? And how can we catch such error ? Thanks, Pavel Tag: help VC++ Activex into Csharp Tag: 108195
  - 6
    - Render window to video port? Is it possible to redirect the rendering of a windows form to the video port/overlay device of a video card? In my situation I must present the contents of a window on an hdtv and I can't use a desktop clone trick because there's going to be another application running that cannot show up on the tv. Any ideas? Tag: help VC++ Activex into Csharp Tag: 108188
  - 7
    - freeware .NET graph library needed Hi! I need such library to make UML modeler with which i'd be able to make UML schemas(primarily for designing software projects).What i'm trying to achieve is to make something like any other UML drawing tool. I've found some commercial ones(yFiles.NET, Essential Diagram)and freeware Netron graph library(but it doesn't contain all UML elements). Thanks! Tag: help VC++ Activex into Csharp Tag: 108175
  - 8
    - vs2003 to vs2005 Hi I have a vb.net 2003 database winform app which uses non-bound controls and the associated plumbing is done in code. If I move it to vs 2005 would it work without any change? Thanks Regards Tag: help VC++ Activex into Csharp Tag: 108169
  - 9
    - Moving the MdiClient area I programmatically moved the MdiClient of my MDI form to be nested inside a Panel so I can control the layout better. I also removed the 3D border on the MdiClient using Interop. When trying to open MDI child forms, I first received an error about the parent not being an MDI container. I suspected this was because I moved the MdiClient, so I set IsMdiContainer back to true after the move. I no longer get the error, but now the MDI children don't display at all. I'm assuming I need to hook the MdiClient back up to the parent form somehow. How do I do this while keeping the MdiClient nested in a Panel? TIA Jared Tag: help VC++ Activex into Csharp Tag: 108168
  - 10
    - VS 2005 SP1 Hi I am almost finished with a vs 2005 (pre sp1) project which I need to deliver in the next couple of days. I am wondering if I should deliver project with sp1. Is it safe to install sp1 at this late stage? Thanks Regards Tag: help VC++ Activex into Csharp Tag: 108166
  - 11
    - "UpdateEvent" I'm looking for some kind of form level event that I can hook/add/use to tell me when ever some input control has changed its state. As a hack currently I set KeyPreview to true and hooked the KeyPress event. This works great for text boxes etc, but if a user uses the mouse to select someting in a listbox it doesnt catch it of course. The idea is something like this, in the even I want to check the state of the inputs and enable disable for example the Save button. Delphi had a neat way to do this with actionlist and I know there are free and 3P action lists for .NET, but this is an existing WinForms app and I cant redo it. I just need a basic event I can hook to properly enable/disable controls. The other "hack" option is a timer, but thats pretty ugly too. I've also considered hooking into the windows message pipe and ignoring obvious ones like WM_Paint etc, but again I'd like to avoid this and find something else. Anyone have any suggestions? -- Chad Z. Hower Microsoft Regional Director "Programming is an art form that fights back" http://www.KudzuWorld.com/ Need a professional technical speaker at your event? http://www.woo-hoo.net Tag: help VC++ Activex into Csharp Tag: 108161
  - 12
    - Flashing scrollbar on MDI child window after cursor key hit! My application has a main form with its "IsMdiContainer" set to 'true'. I create a form to serve as a child form, setting its "MdiParent" to the main form before calling its "Show()" method. The "AutoScroll" property is set to 'false'. My child form class has two scroll bars which I added manually; an HScrollBar and a VScrollBar. Each of these scroll bars has its "TabStop" property set to 'false'. (As mentioned above, the "AutoScroll" property of the child form class is set to 'false'; I do not want to use the form's automatic scroll bars.) Any instance of the child form properly has its OnKeyDown() handler triggered when the child form has focus and regular keys are pressed. All works great -- until I press a cursor key (i.e., up, down, left, right). When I press a cursor key, one of the scroll bars starts to scroll, and starts to flash! When I release the cursor key, the scroll bar continues to flash, and no other key events are received by the child window. Wait... I just solved my own problem! Override OnPreviewKeyDown(), and then disable each scrollbar (set its "Enabled" property to 'false'), and call Invalidate(false) to put a repaint message in to the queue for the form. When the scrollbars are disabled, this is evidently enough to prevent the cursor key from finding a scrollbar and locking to it, starting the flashing, and capturing the input. Upon repaint we can set the Enabled property of the scrollbars back to 'true' if appropriate. Whew! I thought I was going to have to implement my own "MDI" logic instead of using the "IsMdiContainer" feature. Wow, the worst part about Windows Forms is the crazy logic concerning how cursor key events, mouse wheel events, focus, and other things are handled... What next?! Anyhow, I am sharing my discovery for the benefit of others. --- Colin Tag: help VC++ Activex into Csharp Tag: 108136
  - 13
    - How to iterate over a combobox's items? Say cbRoadwayType is my combobox: for (int i = 0; i < cbRoadwayType.Items.Count; i++) { cbRoadwayType.SelectedIndex = i; int val = (int)cbRoadwayType.SelectedItem // INVALID EXCEPTION cast if (val != FILTER_ALL && val != FILTER_NOT_SET) { roadwayList.Add(val); } } But, I get an invalid exception cast. How do I just get the value of the combobox item, based on an index?! Tag: help VC++ Activex into Csharp Tag: 108132
  - 14
    - Packaging registry file only, please Hi! Is there a way to package registry file only? I can not seem to find the way using VS 2003 & Package and Deploy Wizard. In a nutshell, I need to merge a .reg file to create some keys + values. I need to create an .msi package as our clients do not accept anything else. I can not really write a program that does it programmatically and then package it. Any help is greatly appreciated. Many thanks in advance, Tag: help VC++ Activex into Csharp Tag: 108131
  - 15
    - Multiline TextBox with Autocomplete? I have noticed that Autocomplete stops working when you set a TextBox to Multiline. Is this the designed behavior? Is there any way to make it work, other than developing your own custom control? I would also like to see a behavior where the list of suggested items resets after each space, so in other words you could use Autocomplete multiple times in the same TextBox. Do I have to start developing my own control for this? -- Paul Fountain, Software Engineer InsureMe Tag: help VC++ Activex into Csharp Tag: 108117
  - 16
    - Is .NET no good for some things? This is a multi-part message in MIME format. ------=_NextPart_000_001E_01C7362A.C4679EC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It used to be simple in Basic to "open" a printer (like LPT1), then = "write" ASCII characters to it. Alternatively, one could create a = text-file, then a simple DOS copy operation could copy the text file to = a printer using shell. There is no documentation to indicate how this = might still be accomplished=20 Does anybody know if one can still "copy" a file to a windows printer = i.e. use shell to dump a text file to a device (e.g. \\main\HP Laser = which might be a printer attached to one of the nodes of the network or = perhaps to 192.168.1.20 which might be the IP address for a network = printer)? I believe copy can still be done if one maps a device to LPT1 = or something. However, I'm not sure about how to do this using the = network name or the IP address of the printer if it is not connected as = a shared resource of a PC Thanks and have a great day! Bill Angus, MA http://www.psychtest.com ------=_NextPart_000_001E_01C7362A.C4679EC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1586" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>It used to be simple in Basic to "open" = a printer=20 (like LPT1), then "write" ASCII characters to it. Alternatively, one = could=20 create a text-file, then a simple DOS copy operation = could copy=20 the text file to a printer using shell. There is no documentation to = indicate=20 how this might still be accomplished </FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>Does anybody know if one can still = "copy" a=20 file to a windows printer i.e. use shell to dump a text file to a=20 device (e.g. <A href=3D"file://\\main\HP Laser">\\main\HP = Laser</A> =20 which might be a printer attached to one of the nodes of the network or = perhaps=20 to 192.168.1.20 which might be the IP address for a network printer)? I = believe=20 copy can still be done if one maps a device to LPT1 or something. = However, I'm=20 not sure about how to do this using the network name or the IP address = of the=20 printer if it is not connected as a shared resource of a = PC</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Thanks and have a great day!</DIV> <DIV> </DIV> <DIV>Bill Angus, MA<BR><A=20 href=3D"http://www.psychtest.com">http://www.psychtest.com</A></FONT></DI= V></BODY></HTML> ------=_NextPart_000_001E_01C7362A.C4679EC0-- Tag: help VC++ Activex into Csharp Tag: 108114
  - 17
    - Added integrated help to my application Hi, I'd like to add help functionality to my application. I like how the integrated help displays in Visual Studio, and would like to simulate this in my own application. What technologies / components would I need to look at to get this working? I would want the viewer on its own form, which would be set as an MDI child. Thanks Andy Tag: help VC++ Activex into Csharp Tag: 108112
  - 18
    - How do I stop FlashWindowEx when me.handle gets focus? Hi.... I'm using FlashWindowEx to flash the taskbar and titlebar when my processes are done. I set the number of flashes to 5. But when the user returns to the window the flashing continues until all 5 flashes complete. How do you stop the flashing once the user returns to the app.? (Code Below) Thanks for any help, Marc Miller Public Structure FLASHWINFO Public cbSize As Int32 Public hwnd As IntPtr Public dwFlags As Int32 Public uCount As Int32 Public dwTimeout As Int32 End Structure Private Declare Function FlashWindowEx Lib "user32.dll" (ByRef pfwi As FLASHWINFO) As Int32 Private Const FLASHW_CAPTION As Int32 = &H1 Private Const FLASHW_TRAY As Int32 = &H2 Private Const FLASHW_ALL As Int32 = (FLASHW_CAPTION Or FLASHW_TRAY) Public Sub FlashNow(ByVal sender As System.Object, ByVal e As System.EventArgs, ByVal iTimes As Integer) Dim flash As New FLASHWINFO flash.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(flash) '/// size of structure in bytes flash.hwnd = Me.Handle '/// Handle to the window to be flashed flash.dwFlags = FLASHW_ALL '/// to flash both the caption bar + the tray flash.uCount = iTimes '/// the number of flashes flash.dwTimeout = 1000 '/// speed of flashes in MilliSeconds ( can be left out ) '/// flash the window you have specified the handle for... FlashWindowEx(flash) End Sub Tag: help VC++ Activex into Csharp Tag: 108101
  - 19
    - access another forms controls & properties at runtime how can you access a control on a form from another form at runtime. For example to set the datasource and datamember properties of a forms binding source from a different form? I am trying to do something like: form test = new form(); test.show(); test.bindingsource.DataSource = bla bla; Tag: help VC++ Activex into Csharp Tag: 108091
  - 20
    - Using variable as form field name Hi I have two fields field1 and field2 on my form. Is there a way that the field names can be accessed via variable so that choice of the actual field to access is decided at runtime? Thanks Regards Tag: help VC++ Activex into Csharp Tag: 108090
  - 21
    - Is this normal Hi there, Is it normal for form-based events to fire in "InitializeComponent()". I've got a "DataGridView" on a form and I set its "CellValueChanged" event using the forms designer. Ok, VS initializes my event in "InitializeComponent()". However, "InitializeComponent()" later calls "ComponentResourceManager.ApplyResources()" which (to my great surprise) fires my event (which my handler then chokes on since it thinks the window is already running). Looking at the call stack, the event was fired while initializing the header text on one of my "DataGridView" columns (from the resource file). I'm not sure if this particular event should even apply in this situation but in any case, the form hasn't even been created yet. Is it therefore normal for some form-based events to be fired while the constructor is still running. If so then it's potentially dangerous to define events using the forms designer so we should presumably add them ourselves in "OnLoad()" typically (or otherwise design all handlers to check that the window has actually been created which is ugly IMO). Can anyone elaborate on this situation. Thanks. Tag: help VC++ Activex into Csharp Tag: 108085
  - 22
    - DataGridViewComboBox selectively hide arrow I have a column on my DataGridView that is of the type DataGridViewComboBoxColumn. On some of my rows, I want to keep the user from changing the value in that field. What I'm doing now is, as soon as I populate my rows, I run through each row something like this: private: System::Windows::Forms::DataGridView^ Fields; ... #define COMBO_COL 3 for (int i = 0; i < Fields->RowCount; ++i) { if (it shouldn't be changed) { Fields->Rows[i]->Cells[COMBO_COL]->ReadOnly = true; } } That works, but it both looks ugly and doesn't give the user a clue about why the combo box's arrow doesn't do anything. Ideally, what I'd like to do is hide the arrow altogether for those rows. Does anyone have any ideas about how to do that? One thought is that I could change the cell type on the fly to a regular edit cell. I'm not sure how to do that, or if that would just confuse the control altogether. Tag: help VC++ Activex into Csharp Tag: 108077
  - 23
    - Drag-n-Drop to Folder or Desktop I have a form that displays a list of bitmaps. I have read the MSDN docs regarding drag-n-drop operations, and have reviewed some examples online on how to do this, but the examples I have seen thus far only show how to create an internet shortcut file. When the user drags an image from the form to the desktop, I would like to either save the image using a default filename (if possible) or show the Save As dialog so the user can enter a name for the file themselves. So, the form with my images (which are in-memory bitmaps and are not stored on the file system) needs to be able to have the images dragged from the ListView control (which are ListViewItem's of course) and dropped onto a specified folder or the desktop (actual folder or desktop, not part of my app)... Thanks, Mythran Tag: help VC++ Activex into Csharp Tag: 108063
  - 24
    - Help. Getting exception when I rebind grid to another dataset and change column names Hi, I am using a datagrid and two dataset with different data. Both views of the grid contains 5 columns. I toggle between two different views of the grid which display different types of data. When I toggle, I change the last 3 columns to different name and bind a different dataset. When I startup the application, the first dataset when I click on any empty cells, it works find. However, when I switch for the first time to the alternative dataset and change the name, it will throw an exception Index was out of range. Must be non-negative and less than th esize of the collection. Parameter name: index When I keep the column names the same between the two grid views, it works fine. However, I need to change the column names to indentify the column type of data. Any help is appreciated. Tag: help VC++ Activex into Csharp Tag: 108062
  - 25
    - Generating a modal form from a MDI child form I am trying to display a simple modal form from a button on a displayed MDI child form toolstrip. Does anyone have some simple sample code example to send me. Will be much appreciated. Tag: help VC++ Activex into Csharp Tag: 108058

hi

Can anyone tell me how to integrate an activex control developed VC++6.0 to
csharp

Re: help VC++ Activex into Csharp by Bryan

Bryan
Fri Jan 19 05:43:49 CST 2007

Add the control to your ToolBox and drag it onto a form in the C#
project.

--
Bryan Phillips
MCSD, MCDBA, MCSE
Blog: http://bphillips76.spaces.live.com

"hari_Newsgroups" <harry_newsgroups@yahoo.com> wrote in message
news:uqKVBW4OHHA.3544@TK2MSFTNGP03.phx.gbl:

> hi
>
> Can anyone tell me how to integrate an activex control developed VC++6.0 to
> csharp

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