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POWin32 MessageBox doesn't appear
 

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    <p>I'm stuck with a strange problem. I'm making a Win32 application in VC++ 2008, making a class to encapsulate most of the work for easy repetition when calling a <code>MessageBox</code>. The message box` is created (I think) but doesn't show up unless I press the Alt key!</p> <p>What happen exactly is :</p> <ol> <li><p>I run the program</p></li> <li><p>press Enter</p></li> <li><p>the main window lose focus</p></li> <li><p>give beep sound when i click on the main window as if a modal MessageBox is present</p></li> <li><p>either press Escape... focus is gained OR press Alt then the MessageBox appear with alt key pressed (i.e. menu will drop )!!!!!!</p></li> </ol> <p>P.S. It was working fine but suddenly this happened. I didn't find any difference - I even made a new project!</p> <p>This is supposed the Main program:</p> <pre><code>int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) { MSG msg; CWnd cMainWindow(TEXT("DentoMan"), TEXT("Bejkoman")); // pass The class name and window name to the constructor cMainWindow.CreateDef(); //Create the Window while (GetMessage(&amp;msg, NULL, 0, 0)) { TranslateMessage(&amp;msg); DispatchMessage(&amp;msg); } return (int)msg.wParam; } </code></pre> <p>While This is the Class file</p> <pre><code>CWnd::CWnd() { }; CWnd::CWnd(LPTSTR lpszClassName, LPTSTR lpszWindowName) { CWnd::lpszClassName = lpszClassName; CWnd::lpszWindowName = lpszWindowName; }; CWnd::~CWnd() { }; // Create the window with default parameters HWND CWnd::CreateDef(void) { WNDCLASSEX wcex; wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = CS_HREDRAW | CS_VREDRAW; wcex.lpfnWndProc = StaticWndProc; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = (HINSTANCE)GetModuleHandle(NULL); wcex.hIcon = 0; wcex.hCursor = LoadCursor(NULL, IDC_ARROW); wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 4); wcex.lpszMenuName = 0; wcex.lpszClassName = lpszClassName; wcex.hIconSm = 0; RegisterClassEx(&amp;wcex); g_hWnd = CreateWindowEx(0,lpszClassName, lpszWindowName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, wcex.hInstance, this); hInst = wcex.hInstance; //Store hInstance in the class hInst variable if (!g_hWnd) return false; ShowWindow(g_hWnd, SW_SHOW); UpdateWindow(g_hWnd); return g_hWnd; } LRESULT CALLBACK CWnd::StaticWndProc(HWND hWnd, UINT Message, WPARAM wParam, LPARAM lParam) { /* The Only Message we take here so we store the 'this' pointer within the window to identify messages comming from it by the 'this' pointer*/ if ( Message == WM_CREATE ) { SetWindowLong( hWnd, GWL_USERDATA, (LONG)((CREATESTRUCT FAR *)lParam)-&gt;lpCreateParams); } /* Store the window pointer in the class pointer we just created in order to run the right public WndPRoc */ CWnd *Destination = (CWnd*)GetWindowLong( hWnd, GWL_USERDATA ); // If the hWnd has a related class, pass it through if (Destination) { return Destination-&gt;WndProc( hWnd, Message, wParam, lParam ); } // No destination found, defer to system... return DefWindowProc( hWnd, Message, wParam, lParam ); }; LRESULT CWnd::WndProc(HWND hWnd, UINT Message, WPARAM wParam, LPARAM lParam) { // Determine message type switch (Message) { case WM_LBUTTONDOWN: { /* this is a common trick for easy dragging of the window.this message fools windows telling that the user is actually dragging the application caption bar.*/ SendMessage(hWnd, WM_NCLBUTTONDOWN, HTCAPTION,NULL); break; } /*case WM_CREATE: break; */ case WM_CLOSE: PostQuitMessage(0); break; case WM_DESTROY: UnregisterClass(lpszClassName, hInst); PostQuitMessage(0); break; case WM_KEYDOWN: //KeyBoard keys // Which key was pressed? switch (wParam) { case VK_ESCAPE: //close through escape key PostQuitMessage(0); return 0; case VK_RETURN: MessageBox(hWnd, TEXT("DFGDGD"), TEXT("DFGDFG"), NULL); return 0; } // End Switch break; case WM_COMMAND: /*switch(LOWORD(wParam)) { }*/ break; case WM_PAINT: break; default: return DefWindowProc(hWnd, Message, wParam, lParam); } // End Message Switch return 0; }; </code></pre> <p>The Class Header:</p> <pre><code>class CWnd { public: CWnd(); CWnd(LPTSTR lpszClassName, LPTSTR lpszWindowName); virtual ~CWnd(); virtual HWND CreateDef(void); // Create the window with default parameters virtual LRESULT WndProc(HWND hWnd, UINT Message, WPARAM wParam, LPARAM lParam ); private: static LRESULT CALLBACK StaticWndProc(HWND hWnd, UINT Message, WPARAM wParam, LPARAM lParam); HWND g_hWnd; //Global window handle for this window HINSTANCE hInst; //Global instance for this window LPTSTR lpszClassName; LPTSTR lpszWindowName; }; </code></pre> <p>P.S. I included all needed header files, everything goes fine except MessageBox</p> <p>This is also a link to the code on <a href="http://ideone.com/ONBbD" rel="nofollow">here</a></p>
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    1. COPost the relevant code here. Also, a shot in the dark: specify a parent window when showing the message box.
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      1. USJim Brissom
    2. COEdited, linked removed. Don't post unsafe .exe files.. Just paste the relevant code.
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    3. CO... or you can put the code to [ideone](http://ideone.com/) or [pastebin](http://pastebin.com/)
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