I have recently been starting to learn DirectX 8.0. I have read the DirectX 8.0 SDK documentation from microsoft and I have followed along with the first tutorial and written the following sample to see I could use DirectX Graphics or more specifically Direct3D. This code compiles but nothing shows up on the screen. It''s as if nothing happened. I have to ALT-CTRL-DEL it and End it''s task. Please help me to find out what''s wrong with the following code: #include #include HINSTANCE hinst; HWND hwnd; LPDIRECT3D8 d3d = NULL; D3DDISPLAYMODE d3ddm; D3DPRESENT_PARAMETERS d3dpp; LPDIRECT3DDEVICE8 d3dd = NULL; void InitD3D(); void Render(); void Cleanup(); LRESULT WINAPI WinProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int) { WNDCLASSEX wc; MSG msg; hinst = hInstance; wc.cbSize = sizeof(WNDCLASSEX); wc.lpfnWndProc = WinProc; wc.hInstance = hinst; wc.style = CS_DBLCLKS|CS_OWNDC|CS_HREDRAW|CS_VREDRAW; wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hbrBackground = (HBRUSH) GetStockObject(BLACK_BRUSH); wc.lpszMenuName = NULL; wc.lpszClassName = "DirectX"; wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); RegisterClassEx(&wc); hwnd = CreateWindowEx(NULL, NULL, "Dx8", WS_OVERLAPPEDWINDOW, 25, 25, 100, 100, GetDesktopWindow(), NULL, hinst, NULL); InitD3D(); while (GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } LRESULT WINAPI WinProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) { switch(msg) { case WM_DESTROY: Cleanup(); PostQuitMessage(0); return 0; case WM_PAINT: Render(); ValidateRect(hWnd, NULL); return 0; } return DefWindowProc(hWnd, msg, wParam, lParam); } void InitD3D() { d3d = Direct3DCreate8(D3D_SDK_VERSION); d3d->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &d3ddm); ZeroMemory(&d3dpp, sizeof(d3dpp)); d3dpp.Windowed = TRUE; d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; d3dpp.BackBufferFormat = d3ddm.Format; d3d->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &d3dd); } void Render() { d3dd->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,0,255), 1.0f, 0); d3dd->BeginScene(); d3dd->EndScene(); d3dd->Present(NULL, NULL, NULL, NULL); } void Cleanup() { if(d3dd != NULL) { d3dd->Release(); d3dd = NULL; } if(d3d != NULL) { d3d->Release(); d3d = NULL; } }

I may be wrong here but I believe that after you create the window you have to execute the following code:

ShowWindow( hWnd, nCmdShow );
UpdateWindow( hWnd );

Yeah, I tried using ShowWindow and UpdateWindow, but it didn''t work. Maybe I have to use the WS_POPUP style. Any other suggestions.

If you want to avoid ShowWindow(...) & UpdateWindow(...) you can add WS_VISIBLE into your CreateWindowEx(...) call, so it''d say WS_OVERLAPPEDWINDOW | WS_VISIBLE.

Look at this:

quote:
wc.lpszClassName = "DirectX";

and later

quote:
hwnd = CreateWindowEx(NULL, NULL, "Dx8", WS_OVERLAPPEDWINDOW, 25, 25, 100, 100,
GetDesktopWindow(), NULL, hinst, NULL);

The class name given in the WNDCLASS(EX) struct and in the call to CreateWindow(Ex) must be the same. Change your call to CreateWindowEx to:

hwnd = CreateWindowEx(0, "DirectX", "Dx8",            WS_OVERLAPPEDWINDOW, 25, 25, 100, 100,            NULL, // no need to pass the desktop window here            NULL, hinst, NULL); 

The second parameter in that call must match a previously registered window-class.

Also you really should call UpdateWindow and ShowWindow.

Thanks for the help, I think that is the problem. I''ll try it out when I get home. Thanks for all the help. Should I call ShowWindow() and UpdateWindow() or can I just use the WS_POPUP flag in CreateWindowEx()? Kind of weird: I have had more experience with MFC then developing straight Win32 Applications with WinMain. Just as a I learned C++ without C first. Kind of habit that I have. Thanks for all the help, I''ll try the class name.

~Andrew Clark

I meant to say, WS_VISIBLE...not WS_POPUP. Is it best to use WS_VISIBLE in CreateWindowEx() or to use ShowWindow()?

quote:Original post by pentium3id
Meanwhile, and at first glance, is your WinProc
flow working correctly? (use F10 keystrokes to test
code flow inside MSVC++6).

Sorry this is off-topic, but what do you mean by use f10 keystrokes to test?