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TraxMate
Master Cheater
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Joined: 01 Mar 2008
Posts: 363
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 Posted: Fri Nov 18, 2011 8:28 pm Post subject: MessageBox doesn't appear |
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Whenever I call MessageBox at the end of my WinMain function (after the message loop) the message box just refuses to show. Although I can hear the sound of the message box just fine...
It works fine as long as it is called _before_ and inside the message loop but not after :/.
I have debugged it using F11 (visual studio) and everything seems fine. It calls the API just fine like always.
Here's my WinMain code:
| Code: | int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX WcEx;
memset(&WcEx, 0, sizeof(WNDCLASSEX));
WcEx.cbSize = sizeof(WNDCLASSEX);
WcEx.hCursor = LoadCursor(NULL, IDC_ARROW);
WcEx.hIcon = LoadIcon(NULL, IDI_APPLICATION);
WcEx.hInstance = hInstance;
WcEx.lpfnWndProc = WndProc;
WcEx.lpszClassName = g_lpWindowName;
WcEx.style = CS_OWNDC;
if(!RegisterClassEx(&WcEx))
{
ShowWinError("RegisterClassEx");
return EXIT_FAILURE;
}
RECT rcWindow;
SIZE szViewport;
memset(&rcWindow, 0, sizeof(RECT));
rcWindow.right = 1280;
rcWindow.bottom = 720;
szViewport.cx = rcWindow.right;
szViewport.cy = rcWindow.bottom;
AdjustWindowRect(&rcWindow, WS_OVERLAPPEDWINDOW, FALSE);
HWND hWnd = CreateWindowEx(0, g_lpWindowName, g_lpWindowName, WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, rcWindow.right, rcWindow.bottom, NULL, NULL, hInstance, NULL);
if(!hWnd)
{
ShowWinError("CreateWindowEx");
goto Shutdown;
}
if(!InitializeGL(hWnd))
goto Shutdown;
if(!Input.Initialize(hWnd))
{
ShowWinError("Failed to initialize input! RegisterRawInputDevices");
goto Shutdown;
}
Input.SetKeyboardFunc(KeyboardInput);
UpdateWindow(hWnd);
ShowWindow(hWnd, nCmdShow);
SetupRC();
Resize(szViewport.cx, szViewport.cy);
MSG Message;
while(!g_bQuit)
{
if(PeekMessage(&Message, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage(&Message);
DispatchMessage(&Message);
}
Input.Update(Message);
Input.ProcessInput(Timer.GetElapsedSeconds());
RenderFrame();
// Sleep(1);
}
Shutdown:
Input.Shutdown();
ShutdownGL(hWnd, hInstance);
MessageBox(NULL, "Message", "Yay", MB_OK | MB_ICONWARNING); // This refuses to show... This is just for testing, it won't really be here
// Inside Input.Shutdown() there is a message box describing the error(if any) but that will not show as well ...
return 0;
} |
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OmegaCES
Cheater
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Joined: 02 Jul 2011
Posts: 44
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| Posted: Sat Nov 19, 2011 4:32 am Post subject: |
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| Code: | Input.Shutdown();
ShutdownGL(hWnd, hInstance); |
Isn't this calling a shutdown before you display the messagebox? try putting it after. (Unless it has to be there ofcourse).
I don't code in c, hope I have helped a little 
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NoMercy
Master Cheater
![]() Reputation: 1
Joined: 09 Feb 2009
Posts: 289
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| Posted: Sat Nov 19, 2011 11:33 am Post subject: |
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| Code: |
Shutdown:
Input.Shutdown();
ShutdownGL(hWnd, hInstance); |
What is this?
Are you sure if you set a bp on MB, it gets hitted?
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TraxMate
Master Cheater
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Joined: 01 Mar 2008
Posts: 363
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| Posted: Sat Nov 19, 2011 1:19 pm Post subject: |
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Found the problem. The problem was that I was calling DestroyWindow() twice. Once in the window procedure and once in the ShutdownGL() function. Though I don't know why that would matter since I'm not passing a HWND to the message box :s.
@NoMercy: Input.Shutdown() removes the raw input devices and ShutdownGL() destroys the window and the OpenGL rendering context.
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