const WCHAR *

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- Previous
  - 1
    - 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: const WCHAR * Tag: 279476
  - 2
    - 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: const WCHAR * Tag: 279469
  - 3
    - 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: const WCHAR * Tag: 279463
  - 4
    - 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: const WCHAR * Tag: 279461
  - 5
    - 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: const WCHAR * Tag: 279451
  - 6
    - 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: const WCHAR * Tag: 279450
  - 7
    - 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: const WCHAR * Tag: 279414
  - 8
    - 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: const WCHAR * Tag: 279413
  - 9
    - 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: const WCHAR * Tag: 279412
  - 10
    - 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: const WCHAR * Tag: 279408
  - 11
    - 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: const WCHAR * Tag: 279393
  - 12
    - 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: const WCHAR * Tag: 279391
  - 13
    - 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: const WCHAR * Tag: 279384
  - 14
    - 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: const WCHAR * Tag: 279369
  - 15
    - File IO related issue Hi there: Is there any APIs to detect the files are being operating by some API , such as WriteFile? Tag: const WCHAR * Tag: 279365
  - 16
    - 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: const WCHAR * Tag: 279349
  - 17
    - 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: const WCHAR * Tag: 279333
  - 18
    - 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: const WCHAR * Tag: 279328
  - 19
    - 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: const WCHAR * Tag: 279326
  - 20
    - 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: const WCHAR * Tag: 279321
  - 21
    - 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: const WCHAR * Tag: 279320
  - 22
    - 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: const WCHAR * Tag: 279306
  - 23
    - 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: const WCHAR * Tag: 279303
  - 24
    - is this statement correct? strstream s; s << "var%05lX" << operand << '\0'; result: s ==> var%05lXoperand Thanks Jack Tag: const WCHAR * Tag: 279296
  - 25
    - 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: const WCHAR * Tag: 279295
- Next
  - 1
    - 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: const WCHAR * Tag: 279275
  - 2
    - 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: const WCHAR * Tag: 279273
  - 3
    - 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: const WCHAR * Tag: 279266
  - 4
    - 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: const WCHAR * Tag: 279259
  - 5
    - 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: const WCHAR * Tag: 279254
  - 6
    - 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: const WCHAR * Tag: 279244
  - 7
    - 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: const WCHAR * Tag: 279235
  - 8
    - 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: const WCHAR * Tag: 279231
  - 9
    - thread and callback Hi gurus I dont know whether the callback and the main thread exist in the same thread? Tag: const WCHAR * Tag: 279223
  - 10
    - 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: const WCHAR * Tag: 279216
  - 11
    - 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: const WCHAR * Tag: 279214
  - 12
    - 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: const WCHAR * Tag: 279212
  - 13
    - marquee in a dialog hey all, how hard would it be to put a simple marquee in a dialog box. The marquee can be anything scrolling across the dialog such as plain text, hyperlinks, and images. any hints, articles, direction? thanks, rodchar Tag: const WCHAR * Tag: 279211
  - 14
    - Function Identifier Not Found 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: const WCHAR * Tag: 279209
  - 15
    - Function identifier not found 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: const WCHAR * Tag: 279208
  - 16
    - std::vector subscript out of range Hello, I really think I have to get a C++ book.... but let me ask one more question Code Snippet struct { std::string name; ... } FRUIT, *PFRUIT; struct { std::vector<FRUIT> fruitarr; } fruittab; std::string a; fruittab.fruitarr[i].name = a; the variable of i is 0 when called, but it returns vector subscript out of range error Tag: const WCHAR * Tag: 279194
  - 17
    - Question about TCHAR string Hi, I've been spoiled with C# and the easy to use string functions. Now I'm into a bit of C++ for writing a custom action for a DLL to be incorporated into an MSI installer. Yikes. What I'm basically doing is getting the Product Key from the MsiGetProperty() function, like this - TCHAR szPidKey[MAX_PATH]; DWORD dwPath; dwPath = sizeof(szPidKey) / sizeof(TCHAR); MsiGetProperty(hInstall, TEXT("PIDKEY"), szPidKey, &dwPath); So I have my Product ID in szPidKey. Now I want to do some manual verification of it. The Product ID is of the form - 123456789-ABCD-12 I need to verify this code so I need access to the beginning part (123456789) and the end part (12). So I'm looking for a way to substring out those parts of the string. I'm also looking to convert those substrings into integer or long data type so i can do some checking on them, is it ok to use itoa to do that? Thanks very much for any hints. David Tag: const WCHAR * Tag: 279190
  - 18
    - How to turn vector to an address Hi, Here is the code snippet, don't mind its correctness, just take it as an example struct { ... } FRUIT, *PFRUIT; struct { std::vector<FRUIT> fruitarr; }; ============================ I have an address comparison... pos = a - fruitarr; (a is PFRUIT, b4 modification fruitarr was also of type PFRUIT) ============================ And the subtraction worked very well until I changed that line to std::vector The statement pos = a - fruitarr; did not work any more (compile-time error) My question is how do I get the address from the vector<FRUIT> object? Thanks Jack Tag: const WCHAR * Tag: 279181
  - 19
    - CloseHandle and WriteFile Hi there! I create a file using CreateFile(...), and write some data to the file handle ,say hFile, using WriteFile(...) I wonder if I call CloseHandle (hFile) to the handle, at the same time , WriteFile is operating on the file handle , whether the WriteFile will block the CloseHandle? Tag: const WCHAR * Tag: 279172
  - 20
    - fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h> fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h> I am trying to create a DLL, but I need to use CString. What is a work around this error? Thanks Tag: const WCHAR * Tag: 279160
  - 21
    - how do i put this circle into my square hey all, std::string line; into LPCSTR lpString thanks, rodchar Tag: const WCHAR * Tag: 279156
  - 22
    - How to make SetCursor work I would like to set an hourglass cursor. I say: SetCursor(LoadCursor(NULL, IDC_WAIT)) for setting the hourglass cursor and: SetCursor(LoadCursor(NULL, IDC_ARROW)) for going back to the regular cursor. But neither cursor gets set? Please help! Thanks! Tag: const WCHAR * Tag: 279155
  - 23
    - is there another way to get edit box hey all, i found this snippet in tutorial which show how to retrieve a value from an edit box just using win32api, is there another way to get this thru just the api? // TODO: Read an edit box int len; len = GetWindowTextLength(m_hFirstNameEdit); if (len>0) { char* buf; buf = (char *)GlobalAlloc(GPTR, len+1); GetDlgItemText(m_hWnd, IDE_FIRSTNAME, buf, len + 1); // .... work witht the text MessageBox(m_hWnd, buf,"Hello", MB_OK | MB_ICONEXCLAMATION); GlobalFree((HANDLE)buf); } thanks, rodchar Tag: const WCHAR * Tag: 279150
  - 24
    - Dialogbox question If I use dialogbox() function to specify a dialogbox (template already in resource), is there any way for me to specify the dialogbox window size? (since I don't have access to the actual CreateWindow but the dialogbox() function helped did so, so I want to know whether it's possible to specify those sizes manually for the dialogbox in code but not create a window manually.) Tag: const WCHAR * Tag: 279140
  - 25
    - snippet of code hey all, does this snippet of code indicate any presence of MFC or Microsoft Libraries: //Populate ComboBox FillListBox(hwndList); //Set a Default Selection SendMessage(hwndList, CB_SETCURSEL, 0, 0); GetWindowText(hwndList, pVarName, 30); SetWindowText(hwndText, pVarName); return 0; I'm particularly interested in the GET/SET WindowText functions. How would I be able to tell? thanks, rodchar Tag: const WCHAR * Tag: 279133

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

Top

Re: const WCHAR * by Mark

Mark
Tue Jul 24 13:44:55 CDT 2007

nodeval is uninitialized so it will remain invalid until the GetValue() call
succeeds.

Why did you need the cast in the GetValue() call?

Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

<a7zulu@gmail.com> wrote in message
news:1185301666.708833.264840@57g2000hsv.googlegroups.com...
> 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
>

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