problem with DECLARE_PROPPAGEIDS

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- Previous
  - 1
    - Get Visual Studio to compile a different C file from the one in the project..? I am having a hard time trying to do this rather arcane thing. Let me explain I have a firmware codebase which is full of non-standard C extensions. This codebase is then munged by a tool which I invoke using a custom build step or pre-build event to write a new C file which MSVC can compile. I can of course simply run a batch file to copy the original somewhere else, and rename the munged file, but I want to be able to step through the original source in the debugger. This is possible using the #line directive in the munged version. However, the stumbling block seems to be getting the compiler to compile the munged file and not the original. So my question is: Is it possible to get MSVC to compile a different .c file while still keeping the original in the project? Any ideas? Andrew Tag: problem with DECLARE_PROPPAGEIDS Tag: 279546
  - 2
    - Static variable initialization. Hi, In a program of mine I have several singleton classes (see below for the basic interface). I noticed that the constructors for the classes are called in an arbitrary order. As a result a call to a singleton's Get function can return a reference to an object whose constructor has not been called yet! This only happens when I call a singleton's Get function from another singleton's constructor. Is this behavior normal, or is this just something that Windows CE does for me? I've made a workaround, but would like to know if this behavior is according to the C++ standard, or a bug. Regards, Sytse. class A { private: A() { } static A g_A;//Global instance public: static A& Get() { return g_A; } ... } Tag: problem with DECLARE_PROPPAGEIDS Tag: 279538
  - 3
    - MDIGetActive not Working!! Help Required Hi, I have created a Modeless Dialog Box using threads (CWinThread). The thread invokes a dialog box (derived from CDialog) which acts as modeless. The thread is invoked through a menu handler in CMyView class. Now in my dialog box that is invoked in Cwinthread derived class , i want my doc or view data to be there. Now can u tell me how can i do that. I tried this but the execution terminates abnormally. I placed a static function in CMyDoc to return a pointer to the active document. In this function i used AfxGetApp() to get m_pMainWnd and then MDIGetActive() to get active frame. I have called this function in my dialog's OnInitDialog() function. It is the MDIGetActive() that is causing abnormal execution. Can u help? Code for static function is: CMDIChildWnd * pChild = ((CMDIFrameWnd*)(AfxGetApp()->m_pMainWnd))->MDIGetActive(); if ( !pChild ) return NULL; CDocument * pDoc = pChild->GetActiveDocument(); if ( !pDoc ) return NULL; // Fail if doc is of wrong kind if ( ! pDoc->IsKindOf( RUNTIME_CLASS(CMyDoc) ) ) return NULL; return (CMyDoc *) pDoc; Thanx in advance Tag: problem with DECLARE_PROPPAGEIDS Tag: 279532
  - 4
    - How to read uncode encoded files? Hi. I try to read unicode encoded files. File starts with unicode BOM (0xFEFF). Here's the file content. FF FE 42 00 45 00 47 00 49 00 4E 00 And I use following code. if ((fd = _open(buffer, _O_RDONLY)) != -1) { while (_read(fd,&mem, 1) == 1) ; _close(fd); } When I check the contents of 'mem'. The contents of 'mem' are 42 45 47 49 4E Why this happen? How can I read Unicode BOM (0xFEFF)? Tag: problem with DECLARE_PROPPAGEIDS Tag: 279525
  - 5
    - no response from serial port I have a laser shutter that operates through a serial port, say COM1. The only input the shutter needs is a "\n@" command that sets the shutter to open/closed position. I have no problem controlling the shutter through a hyperterminal. But when I try to control the instrument through an MFC .NET 2003 app I get very slow response, and I can't get the shutter to open/close. I copied all the COM1 settings I have set in the hyperterminal: CSerial serial; LONG lLastError = ERROR_SUCCESS; lLastError = serial.Open("COM1"); OutputDebugString("Opened serial port for shutter control!\n"); lLastError = serial.Setup(CSerial::EBaud300,CSerial::EData8,CSerial::EParNone,CSerial::EStop1); OutputDebugString("Settings for serial port for shutter control OK! \n"); lLastError = serial.SetupHandshaking(CSerial::EHandshakeHardware); OutputDebugString("Hanshaking for serial port for shutter control OK! \n"); lLastError = serial.Write("\n\@"); OutputDebugString("Sent data for shutter control!\n"); serial.Close(); The delay between the "handshaking OK" message and the "sent data" message can be as long as ~10 seconds, and the shutter does not open/ close anyway. So the communucation seems to be there, but smth is wrong. How can I debug this? The original working hyperterminal connection is set at 300 baud rate, 8 data bits, no parity, 1 stop bit, and no flow control. It also needs ASCII echoed, but that probably is irrelevant. The above routine works just fine for COM3 which controls another instrument, with different settings. Tag: problem with DECLARE_PROPPAGEIDS Tag: 279524
  - 6
    - how do i look it up? hey all, i've been reading petzold and he says to look it up in the header files to find more detail. for instance, where can i go to see what's in <windows.h>? thanks, rodchar Tag: problem with DECLARE_PROPPAGEIDS Tag: 279518
  - 7
    - correct usage of ostringstream The two functions foo() and bar() are trying to do the same thing. foo doesn't work but bar does. My question "Is bar a leagal function or is it treading into the undefined behaviour and I'm simply getting away with it"? I have tried the code both in VC 6 and VC 2005. Both exhibit the same behaviour. As long as I use the ostringstream::str() function as the first output variable it seems to work. As soon as it appears in a different location, the code will crash. #include "stdafx.h" #include <string> #include <sstream> using namespace std; std::string SomeFunc( const std::string &str ) { // Iterate through string and calculate a checksum return " checksum "; } void foo() { const char stx = '\2'; const char etx = '\3'; std::ostringstream os; os << stx << "One" << SomeFunc(os.str().substr(1)) // crashes here << etx; std::string done = os.str(); } void bar() { const char stx = '\2'; const char etx = '\3'; std::ostringstream os; os << stx << "One"; os << SomeFunc(os.str().substr(1)) // works but why? << etx; std::string done = os.str(); } int main(int argc, char * argv[]) { argc; argv; foo(); // doesn't work bar(); // works fine return 0; } Tag: problem with DECLARE_PROPPAGEIDS Tag: 279513
  - 8
    - Help with a patch I want to inject the following code into the host of my DLL and patch it to remove references to memory locations in my DLL. #pragma code_seg(".inject") LRESULT CALLBACK MyWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { if ( uMsg == WM_SYSCOMMAND && (wParam & 0xFFF0) == SC_CLOSE ) wParam = SC_MINIMIZE; return CallWindowProc(OldWndProc, hwnd, uMsg, wParam, lParam); } #pragma code_seg() #pragma comment(linker, "/SECTION:.inject,R") #define INJECT_SIZE 0x3E // from DUMPBIN.EXE As far as I can tell the only reference to memory locations in my DLL is the reference to "OldWndProc" (gotten when the new WNDPROC is set). But when I look at the machine code I see two references to memory locations in my DLL: 55 8B EC 81 7D 0C 12 01 00 00 75 16 8B 45 10 25 F0 FF 00 00 3D 60 F0 00 00 75 07 C7 45 10 20 F0 00 00 FF 75 14 FF 75 10 FF 75 0C FF 75 08 FF 35 [ 60 F0 7E 01 ] FF 15 [ 2C C1 7E 01 ] 5D C2 10 00 The first is the expected location of "OldWndProc". What's the second? If it's a jump to CallWindowProc, how would I patch it? [The exe is build with Borland.] Thanks. -- - Vince Tag: problem with DECLARE_PROPPAGEIDS Tag: 279510
  - 9
    - dll interface specification and includes Hi. I have a dll I've written in visual studio 2005 standard. It has a bunch of functions that are defined similarily to this in a header: __declspec(dllexport) int LoadStuff(int & parm1, char * parm2); __declspec(dllexport) int UnLoadStuff(void); Now, I load this library dynamically from another app developed in another vendors older compiler. There I have code like this in a header: typedef int (* cdecl functionPointerLoadStuff)(int & parm1, char *parm2); typedef int (* cdecl functionPointerUnLoadStuff)(void); and in the same file I have this: class myClass { public: functionPointerLoadStuff functionLoadStuff; functionPointerUnLoadStuff functionUnLoadStuff; }; Finally in my class implementation I have code like this: functionLoadStuff = (functionPointerLoadStuff ) GetProcAddress(hLibrary,"LoadStuff"); functionUnLoadStuff = (functionPointerUnLoadStuff) GetProcAddress(hLibrary,"UnLoadStuff"); I'm wondering if there is some way to not have to maintain the header files separately since in a sense they both code for the same interface. I'd rather not have to separately update each one if at all reasonably possible. I'm not so sure that the other vendors old compiler will recognize everything, but I'm perusing the possibilities now. Thanks Jeff Kish Tag: problem with DECLARE_PROPPAGEIDS Tag: 279506
  - 10
    - Creating Popups and Display Graph Hi, I have an MDI App. I have a doc and view opened displaying some data. Now in my menu I have a View->Plot item (ID_VIEW_PLOT) clicking on which a new window (popup) will open on which I can display a graph. To display a graph i need a CFormView derived view window which gets displayed on clicking View->Plot. Can anyone detail me out how i can do this.I have the code to display charts but i need the way to create a popup which uses my CFormView derived class to display the pop up dialog. I need to have the handler for ID_VIEW_PLOT in CFormView derived class and not in CWinApp nor in CMyAppView class. I want 2 type of view classes wherein the form view opens only if i click the menu item. Thanx in advance. Tag: problem with DECLARE_PROPPAGEIDS Tag: 279505
  - 11
    - Unhandled Exception from mscorlib.dll Hi, I have an application that is mostly Java, but uses a dll that I built with Visual C++ (Visual Studio 2005). The dll is responsible for setting folder permissions (Java can't do this without going native). I've gotten the code work under normal circumstances, but I've noticed that if I try to set permissions for a user that doesn't exist (someone could enter an invalid user name), I get an exception of System.Security.Principal.IdentityNotMappedException. This really isn't too much of a problem, and I've managed to catch it in a try block. My problem is that even though I catch this exception, it is somehow bubbled up to the running JVM, as it crashes with an error pop up window showing: The instruction at "0x7c910e03" referenced memory at "0x66657220". The memory could not be "written". Click OK to terminate the program The memory locations seem to always be the same. I've done some testing and have tested manually throwing an exception of this type in a different dll and when I catch it, I get no problems reported to the jvm. If I don't catch it, it's a completely different crash altogether and the JVM reports this as a bug in the JVM, so it's not that an exception is making its way up uncaught. The C++ code is mixed (managed/unmanaged) and the permissions are set on the folder through some .NET 2.0 calls. This is what is throwing the initial exception. I have suspect that my problem has to do with this. Also, when running this code without catching the exception, the debugger says that the exception occurred in mscorlib.dll. I'm thinking that this could also be partly why Java is seeing the error since the exception is being generated outside of my own dll. I understand that this may be somewhat off topic as I'm interfacing with Java, or may be more related to the .NET framework, but it seems like I'm missing something from Visual C++. Any help is greatly appreciated. Thanks, Will Here is the shortest sample of C++ code that does what I need: using namespace System; using namespace System::Security::AccessControl; using namespace System::IO; int main(array<System::String ^> ^args) { String ^folder = "C:/Documents and Settings/will/Desktop/testFolder"; String ^user = "wrongDomain\\wrongUser"; FileSystemAccessRule ^container = gcnew FileSystemAccessRule(user, FileSystemRights::Modify, InheritanceFlags::ContainerInherit, PropagationFlags::None, AccessControlType::Allow); FileSystemAccessRule ^object = gcnew FileSystemAccessRule(user, FileSystemRights::Modify, InheritanceFlags::ObjectInherit, PropagationFlags::None, AccessControlType::Allow); DirectorySecurity ^dirSecurity = Directory::GetAccessControl(folder, AccessControlSections::Access); dirSecurity->SetAccessRuleProtection(true, false); //try { dirSecurity->AddAccessRule(container); // Exception gets thrown here for a bad user dirSecurity->AddAccessRule(object); Directory::SetAccessControl(folder, dirSecurity); //} catch(System::Security::Principal::IdentityNotMappedException ^ex) { // Console::WriteLine("Caught Exception " + ex->Message); //} Console::ReadKey(); return 0; } Tag: problem with DECLARE_PROPPAGEIDS Tag: 279487
  - 12
    - corrupt windowProc() hi, i have a question: i've worked with a corrupt windowProc() for a long time. instead of calling DefWndProc(), i issued a 'return 0;'. the problem is that, it messed with XP, and when i (for instance ) move the mouse with 'control' pressed or 'shift', the mouse jerks. reinstalling the mouse and keyb. drivers doesn't help. how do i fix this? (i already fixed wndProc().) greets, marc Tag: problem with DECLARE_PROPPAGEIDS Tag: 279478
  - 13
    - const WCHAR * const WCHAR* nodeval; if (FAILED(hr = pReader->GetValue((LPCWSTR *)&nodeval, NULL))) { wprintf(L"Error getting value, error is %08.8lx", hr); return -1; } When I try debugging the const WCHAR* datavariable in the locals screen, I keep getting a <Bad Ptr> displayed as the Value. How exactly does the const WCHAR * work and how do I know if that pReader- >GetValue function is actually setting nodeval correctly? Thanks Tag: problem with DECLARE_PROPPAGEIDS Tag: 279477
  - 14
    - Subclass host EXE's HWND then unload DLL? In a DLL (plugin extension for an EXE) I write the following WNDPROC to the EXE's address space. Its purpose is simply to turn <WM_SYSCOMMAND, SC_CLOSE> into <WM_SYSCOMMAND, SC_MINIMIZE> (make the app hard to exit). #pragma code_seg(".inject") LRESULT CALLBACK MyWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { static WNDPROC LocalOldWndProc = NULL; static BOOL bNeedInit = TRUE; // CWP = CallWindowProc() static LRESULT (WINAPI *CWP)(WNDPROC, HWND, UINT, WPARAM, LPARAM); if ( bNeedInit ) { LocalOldWndProc = OldWndProc; HMODULE hUser32 = GetModuleHandle("user32.dll"); (FARPROC&) CWP = GetProcAddress(hUser32, "CallWindowProcA"); bNeedInit = FALSE; } if ( uMsg == WM_SYSCOMMAND && (wParam & 0xFFF0) == SC_CLOSE ) wParam = SC_MINIMIZE; return CWP(LocalOldWndProc, hwnd, uMsg, wParam, lParam); } #pragma code_seg() #pragma comment(linker, "/SECTION:.inject,R") #define INJECT_SIZE 0x74 // from DUMPBIN.EXE I inject the code as follows: BYTE *NewWndProc = (BYTE*) VirtualAlloc(NULL, INJECT_SIZE, MEM_COMMIT, PAGE_EXECUTE_READWRITE); BYTE *p = (BYTE*) MyWindowProc, *q = NewWndProc; for ( INT i=0; i<INJECT_SIZE; i++ ) *q++ = *p++; // inject new wndproc OldWndProc = (WNDPROC) SetWindowLong(hWndAppFrame, GWL_WNDPROC, (LONG) NewWndProc); SendMessage(hWndAppFrame, WM_NULL, 0, 0); // make it initialize The point of the new WNDPROC's initialization routine is to remove any future reference to memory locations in the DLL. It all works fine but the DLL can't be unloaded (I'd like to unload it, leaving the subclassing in place). If the DLL unloads (just before app shutdown or at my request) there are two GPF's in module_unknown and one in kernel32.dll (apparently in DuplicateHandle() (?). Am I missing something fundamental here, something that would make the crash expected? Thanks. -- - Vince Tag: problem with DECLARE_PROPPAGEIDS Tag: 279476
  - 15
    - win32 api walkthrough request hey all, could someone please do a simple walkthrough with me on how create a simple window app that has a tab control on it with maybe a single button in one of the tabs that does a simple hello world message. i'm still trying to grasp some concepts here so please be gentle. if possible, could it be as close to low-level c++ as possible (which means to me and i could be a wrong newbie: no mfc or extra existing libraries). i don't even know how possible that is. thanks, rodchar Tag: problem with DECLARE_PROPPAGEIDS Tag: 279469
  - 16
    - Displaying Graphs I have used ur way and its working fine. But i still have a little problem. I will explain to you my situation and please let me knoe if you can help. I have an MDI App. I have a doc and view opened displaying some data. Now in my menu I have a View->Plot item (ID_VIEW_PLOT) clicking on which a new window (popup) will open on which I can display a graph. To display a graph i need a CFormView derived view window which gets displayed on clicking View->Plot. Can u detail me out how i can do this. I need to have the handler for ID_VIEW_PLOT in CFormView derived class and not in CWinApp class. With your previous solution I am able to create new windows. But now i want 2 type of view classes wherein the form view opens only if i click the menu item. Thanx in advance. Rishabh Tag: problem with DECLARE_PROPPAGEIDS Tag: 279463
  - 17
    - VS2005 SP1 Hell We upgraded to VS2005 SP1 and of course our code doesn't run now :-) We get the "app config is incorrect, etc.". Anyway, I think its because its not loading the right runtime libraries. So, we've updated our installation so that the SP1 runtime libraries get put in our app directory now. Problem is, its still loading the libraries from the SxS storage area. We really don't want to force every user to go run some other MS runtime install kit to be able to run our SW. So... the question is, how do we force our app to load the runtime libs from the app directory? This used to be a simple matter of putting all the right DLLs in your app directory. Whats the easiest way to do this? Tag: problem with DECLARE_PROPPAGEIDS Tag: 279461
  - 18
    - MD5 Hashing Hi there, Is it possible to create an MD5 hash of a series of bytes using the Crypto API? I'm presuming that the .NET Framework MD5CryptoServiceProvider merely wraps the win32 API. If so, does anyone have any examples of doing this? Many thanks in advance. Nick. Tag: problem with DECLARE_PROPPAGEIDS Tag: 279451
  - 19
    - Creating MDI Child Windows In my application(MDI AppWizard exe) I want to create a new child window when i click a certain menu item in my main menu (like in File->New) where I can display a graph. Please tell me how I can a create a new child window and use it. Thanx in advance, Rishabh Tag: problem with DECLARE_PROPPAGEIDS Tag: 279450
  - 20
    - Exception and GetLastError() Hi there: look at code blow //////////////////// try { blah blah blah }catch(...) { DWORD dw = GetLastError() } //////////////////// Does it make sence to call GetLastError() in catch block? In my opinion, I dont think it's necesary do like above, but could sure about it. Tag: problem with DECLARE_PROPPAGEIDS Tag: 279414
  - 21
    - context switch I was just wondering if Windows XP always saves and restores the MMX and SSE registers during a context switch. Any help is appreciated. Thank you. Tag: problem with DECLARE_PROPPAGEIDS Tag: 279413
  - 22
    - multi-process singleton DLL I have a DLL that exports a class that allows a program to access a unique system resource. At the moment, the DLL is implemented as a singleton such that any thread in a given process is using the same resource handle. But, if a second, unrelated process loads the DLL and accesses it, this process will try to create its own handle to the resource which fails because it's already in use by the first process. How do I give the second process access to the handle that's being used by the first process so that both can query the resource? Thanks, PaulH Tag: problem with DECLARE_PROPPAGEIDS Tag: 279412
  - 23
    - Hadnling Large memory Imagine 2 GB of memeory map data and if user changes a bit we should be able to find the resultant change in the binary location update that specific byte. Give me some larger memory based comparison APIs in .NET. Tag: problem with DECLARE_PROPPAGEIDS Tag: 279408
  - 24
    - Questions about VC++ Hi dear experts, I'm not experienced in VC++ but i have VC++ 6.0 just for a very few experience. I'm confused and i need to know someting about C++ application development under VC++ 6 or more. Here to go: 1-Is the most efficent way to develop GUI-based applications possible with MFC or what else? What's MFC used for? 2-What's the best way to learn VC++ or C++ with Windows app. developing? Which books? Web tutorials? There are some and a few free tutorials which are very fragmented and need to know which dicipline or procedure(s) is/are the most strong steps to learn VC++ ? I appreciate if you had useful steps till right now with your experiences. 3-When compared to Basic, VC++ or C++ seems much more complicated and has more mistake rist while coding, that's why i'm a bit concerned, so what are the basics understanding of Visual C++ enviroment/C++ ? (For example: Declarations, strings, using variables...) These can be generated more, so please post your feedback in order to undertand about VC++ coding disipline, recognizing enviroment and programming basics/tricks to make explicit things. Regards... Tag: problem with DECLARE_PROPPAGEIDS Tag: 279393
  - 25
    - GETMESSAGE hook, WM_SYSCOMMAND, SC_CLOSE, and the "X" button? In an extension (DLL) to a subsystem:windows app I'm trying to make the app hard to close. A simple WH_GETMESSAGE hook correctly sees <WM_SYSCOMMAND, SC_CLOSE> when it's generated by the system menu's "Close" (also <Alt-F4>) and translates it into <WM_SYSCOMMAND, SC_MINIMIZE>. But my hook fails to see <WM_SYSCOMMAND, SC_CLOSE> when it was generated by the title bar's "X" button. The application does not set any other hooks. What's going on here? Can I work around it? Thanks. -- - Vince Tag: problem with DECLARE_PROPPAGEIDS Tag: 279391
- Next
  - 1
    - Performance issue Hi, I'm trying to improve the performance, but found some issue. When a function call from FileA to FileB that will have performance loss. But if the both function in the same file that will have a better peformance. Is it normal? Or have some way to improve it? FileA.cpp ------------ HRESULT functionA() { return S_OK; } void functionMain() { for (int i=0; i<10000; i++) functionA(); for (int i=0; i<10000; i++) functionB(); } FileB.cpp ------------ HRESULT functionB() { return S_OK; } -- Herman Man Tetragames Studio Limited Tag: problem with DECLARE_PROPPAGEIDS Tag: 279384
  - 2
    - Instantiate Class with/without operator new? Hi, I'm trying to understand the difference between instantiating a generic C++ class, A) using operator new, B) not using operator new. I have a simple class called Numbers, that can add or multiply two ints supplied to the constructor. It seems to work regardless of whether I use new or not. I'm interested to know when I should use new for Class instantiation and when not to use it. I tried to find the answer by searching, but 'new' is not a very common word. Here's how my calling code looks in _tmain(), note one instance uses pointers, the other does not int a,b; Numbers * n1 = new Numbers(4,5); a = n1->Add(); wcout << a << endl; // prints 9 b = n1->Multiply(); wcout << b << endl; // prints 20 delete n1; Numbers n2 = Numbers(5,6); a = n2.Add(); wcout << a << endl; // prints 11 b = n2.Multiply(); wcout << b << endl; // prints 30 -- Gerry Hickman (London UK) Tag: problem with DECLARE_PROPPAGEIDS Tag: 279369
  - 3
    - File IO related issue Hi there: Is there any APIs to detect the files are being operating by some API , such as WriteFile? Tag: problem with DECLARE_PROPPAGEIDS Tag: 279365
  - 4
    - Define a larger code block Hi, As I can define something like #define ABC(x) if(x){x = NULL;} but how can I define something similar but the code block is relatively large (like several lines testing different cases, etc)? Thanks, Alan Tag: problem with DECLARE_PROPPAGEIDS Tag: 279349
  - 5
    - System Requirements for Express Edition I would like to install the Express Edition on a system that does not have the memory/process speed shown under the system requirements for this edition. If my system is undersized, will the Express Edition not function at all? Or just slowly. Anyone have experience here? Thanks in advance Tag: problem with DECLARE_PROPPAGEIDS Tag: 279333
  - 6
    - Template function question I'm using Visual Studio .NET 2003. I don't understand what's going on with this code (why the compiler accepts the call to DoSomething2 but not DoSomething1) : template< typename T > void DoSomething1( void (*)( T ), T ); template< typename T > struct wrap_type { typedef T type; }; template< typename T > void DoSomething2( void (*)( T ), typename wrap_type< T >::type ); void F1( const int & ); void main() { // error C2782: 'void DoSomething1(void (__cdecl *)(T),T)' : template parameter 'T' is ambiguous // could be 'int' // or 'const int &' //DoSomething1( &F1, 1 ); // Works DoSomething2( &F1, 1 ); } Any insights would be appreciated. ---Chris Tag: problem with DECLARE_PROPPAGEIDS Tag: 279328
  - 7
    - resource editor newbie hey all, what is the story behind the resource editor? Does every project need one? Is this like the form designer in c#.net? thanks, rodchar Tag: problem with DECLARE_PROPPAGEIDS Tag: 279326
  - 8
    - application configuration hey all, i'm trying to create a file that holds settings for when my application starts up. can someone please tell me what are the new and old ways of doing this? thanks, rodchar Tag: problem with DECLARE_PROPPAGEIDS Tag: 279321
  - 9
    - One-time initialization of statics in a multithreaded world Hi everybody, I cooked a macro for initializing objects once in our project, could you review and criticize it, please? I'm mostly interested in correctness, not performance :) I must say that I don't care about reentrance in the same thread (the potential "problem" I see) and that I don't want to go through the InitOnce* API. #define ONE_TIME_INITIALIZE(TYPE, NAME, INITIALIZER) \ static TYPE* NAME##StaticPtr = NULL;\ static LONG NAME##InitState = 0;\ if(InterlockedCompareExchange(&NAME##InitState, 1, 0) == 0) \ { \ static TYPE NAME##Handle(INITIALIZER); \ InterlockedExchangePointer(&NAME##StaticPtr, &NAME##Handle); \ InterlockedExchange(&NAME##InitState, 2); \ } \ else \ { \ while(InterlockedCompareExchange(&NAME##InitState, 2, 2) != 2) {} \ } \ TYPE* NAME##Ptr;\ InterlockedExchangePointer(&NAME##Ptr, NAME##StaticPtr); \ TYPE& NAME = *(NAME##Ptr); Thanks in advance, Bertrand Tag: problem with DECLARE_PROPPAGEIDS Tag: 279320
  - 10
    - Portability and MDI Application Hi, I am creating an application using MS Visual C++ 6.0 and MFC (AppWizard exe). But when I run its debug version in other computers where Visual Studio is not installed, its gives an error on startup (Linking to MFC42D.dll failed). But it runs fine on computers having VStudio installed. Please Tell me how can I make my application portable. Secondly, in my application(MDI) I want to create a new child window when i click a certain menu item in my main menu (like in File->New) where I can display a graph. Please tell me how I can a create a new child window and use it. Thanx in advance, Rishabh Tag: problem with DECLARE_PROPPAGEIDS Tag: 279306
  - 11
    - How to check dll version? Hi, I have got a vc6.0 project from my coleague. There are many dlls in this project and export many functions. So in the main application, there are bunch of "GetProcAddrss". I don't this kind of style. I have a little knowledge of COM but do not have many experience, so I don't want to use COM. I want to export a class for every dll. The code like below: //public interface file class IHardwareInterface{ public: virtual DWORD GetHost()=0; virtual DWORD AddHost()=0; ... }; extern "C" __declsepc(dllexport) IHardwareInterface* CreateInstance(); //implement file class CHarewareImpl : public IHardwareInterface { ... }; Now, if in main application, I only need to create an interface for every dll. I don't have to write bunch of "GetProcAddess". If I want to add more export functions, I should update the interface class. What I worried about is if I use the old dll, main application will not report any errors when call "CreateInstance". It will report an error when I call the new function. Is there any method to check whether the dll is consistent with the interface file? Any advice is appreciated. Thanks in advanced. Tag: problem with DECLARE_PROPPAGEIDS Tag: 279303
  - 12
    - is this statement correct? strstream s; s << "var%05lX" << operand << '\0'; result: s ==> var%05lXoperand Thanks Jack Tag: problem with DECLARE_PROPPAGEIDS Tag: 279296
  - 13
    - MMX registers I was just wondering if there is a way to tell Visual Studio to use the MMX registers to improve performance. Thanks. Tag: problem with DECLARE_PROPPAGEIDS Tag: 279295
  - 14
    - excerpt from lecture notes help hey all, http://www.difranco.net/cop2334/Outlines/fileproc.htm there's a section called: Writing Data Randomly to a Random-access File can you make it write plain text to the text file and still make all the random stuff work? what do you need to changed to make it write as plain text instead of binary? thanks, rodchar Tag: problem with DECLARE_PROPPAGEIDS Tag: 279275
  - 15
    - Structure size I would like to allocate a structure size of 1024 bytes but I want the compiler to do the calculation for me. typedef struct { int var1; short var2; long var3; char var4[ ?????? ]; } MYSTRUCT; What I want to do is replace the ?????? something that will automattically make the total structure 1024 bytes without having to manually count the bytes of the other members myself. Is that possible in vc++? Thanks. Tag: problem with DECLARE_PROPPAGEIDS Tag: 279273
  - 16
    - Basic terminology help hey all, what's the difference between an API and a library of functions such as MFC? Are these terms synonomous? thanks, rodchar Tag: problem with DECLARE_PROPPAGEIDS Tag: 279266
  - 17
    - Petzold's tome hey all, i started my reading of Programming Windows and have a newbie question about the following excerpt: Microsoft Windows version 3.1 was released in April 1992. Several significant features included the TrueType font technology (which brought scaleable outline fonts to Windows), multimedia (sound and music), Object Linking and Embedding (OLE), and standardized common dialog boxes. Windows 3.1 ran only in protected mode and required a 286 or 386 processor with at least 1 MB of memory. The last sentence is my question what does that mean in lamen's terms to run in protected mode? thanks, rodchar Tag: problem with DECLARE_PROPPAGEIDS Tag: 279259
  - 18
    - Managed C++ changing a forms property (Text) Hey, I'm working more with C++ nowadays (Creating host managers for a game, and i need the asm functionality to get it all working. I am trying to do (from frmAttach), changing the Text property of frmMain ---- i am from VB, so i have tried frmMain.Text, frmMain().Text, frmMain::Text, etc. How would i achieve this? Cheers Tag: problem with DECLARE_PROPPAGEIDS Tag: 279254
  - 19
    - get the idle time of an excel application I need to get the idle time of an excel application that is opened through VC++. Once the excel is opened there should be a timer that starts and it should re start when ever there is some activity in the excel and if the excel is ideal for about 15 mins then there should be a pop up message Tag: problem with DECLARE_PROPPAGEIDS Tag: 279244
  - 20
    - Compiler optimization problem in MSVC 2003 Release mode Hi, I have written a small function to check whether a single precision variable is sufficient to hold a double precision value. The code is below #include <stdio.h> int cmpFloat_to_Double(float x, double y) { return x == y;} #define IsSinglePrecisionSufficient(a) cmpFloat_to_Double((float)a, a) void main( void ) { double b = 0.7; printf("%d",IsSinglePrecisionSufficient(b)); } It works fine in debug mode giving output of 0 but in release it gives 1. Also if i change int cmpFloat_to_Double(float x, double y) { return x == y;} to int cmpFloat_to_Double(volatile float x, volatile double y) { return x == y;} it works fine in release mode too. Thanks Shireesh Tag: problem with DECLARE_PROPPAGEIDS Tag: 279235
  - 21
    - How to include a header file in another header file that.... Hello, I have a global header file called TypeDefs.H, this file is included in header file of every class of my project. because all classes use custom types. Now I have a class called CMyData which is also a member of some structs in TypeDefs.H, so I have to include MyData.H in TypeDefs.H problem is some members of CMyData are custom and defined in TypeDefs.H so I also have to include TypeDefs.H in MyData.H I agree that it may seem ugly but in this way I can keep things organized in my brain, but compiler dose not like that and shouts loudly with thousands of error messages. I even tried to use <code> #ifndef MY_DATA_H_ #define MY_DATA_H_ ... #endif </code> in MyData.H and <code> #ifndef TYPE_DEFS_H_ #define TYPE_DEFS_H_ ... #endif </code> in TypeDefs.H but problem persists can someone kindly tell me how can I get over this problem:) Tag: problem with DECLARE_PROPPAGEIDS Tag: 279231
  - 22
    - thread and callback Hi gurus I dont know whether the callback and the main thread exist in the same thread? Tag: problem with DECLARE_PROPPAGEIDS Tag: 279223
  - 23
    - Self Extracting Exe (how?) Hello All, I want to create a self-extracting executable to bind several files. I have been looking at using custom resources to hold the desired files then re-create the files from the resources. However, I ran into a problem. I've been using HGLOBAL hResource = LoadResource(hInst, FindResource(hinst,...,...)); LPVOID pData = LockResource(hResource); /// Use data... FreeResource(); Using this method, I have not been able to find the size of the memory allocated. Without the size, I'm not able to know where each file ends. GlobalSize() can not be used. Does anyone have any suggestions or different approaches? Thank you, M Tag: problem with DECLARE_PROPPAGEIDS Tag: 279216
  - 24
    - help with this article please hey all, can somone please try to open the source code in the following article in VC++. Apparently the author used some other editor and when I try to open it up I get a compile error. http://www.codeproject.com/win32/Win32SDK_C_TabCtrl.asp thanks, rodchar Tag: problem with DECLARE_PROPPAGEIDS Tag: 279214
  - 25
    - Function Identifier Not Found Error Hi, I was trying to compile some code and I am getting a "Function identifier not found" error. I can't figure out why since the function that it claims is not identified is very clearly laid out. Here is the declaration in my h file: #pragma once #include "afxwin.h" class CGUIDlg : public CDialog { // Construction ... // Implementation protected: .. public: BOOL processEventMsg(time_t TimeSec, UCHAR chan, int strtID, UCHAR *buf, int siz); ... ... }; My function is written in the code as: BOOL CGUIDlg::processEventMsg(time_t TimeSec, UCHAR chan, int strtID, UCHAR *buf, int siz) { ... } And it is called in another function as: void getAllRs232( int lr ) { ... processEventMsg(TimeSec, (UCHAR)(lr+8),elmThree*32, adrs, length-1); // These variables have been declared and used ... } However upon compilation the error states that processEventMsg identifier is not found. I've tried moving around the function to different area of the code but it gives the same error. Does anyone have any ideas about what could cause this? Thanks very much in advance for any help! Tag: problem with DECLARE_PROPPAGEIDS Tag: 279212

Hi,
In my activex control i tried to add new property page everything
compiled fine. But the problem is while registering the control it is
showing an assertion failure. while debugging i found that the problem
is with DECLARE_PROPPAGEIDS. While i comment this thing in the
controls header file, no assertion failure is throwing up. Any idea
what is causing the problem?

DECLARE_PROPPAGEIDS(CMyCtrl)

BEGIN_PROPPAGEIDS(CMyCtrl, 1)
PROPPAGEID(CMyCtrlPropPage::guid)
END_PROPPAGEIDS(CMyCtrl)

I tried changing the guids when i encountered this error. But it is of
no effect.

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