Initialisation problem. (Code inc.)

  

HINSTANCE hInstance;
HWND hWnd;
HDC hDC;
HGLRC hRC;
 
 
 
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) 
{
	hInstance = hInst;
	
	wndRegisterClass();
	wndChangeDisplayMode(1024, 768, 32);
	hWnd = wndCreateWindow(1024, 768);
	hDC = GetDC(hWnd);
	wndSetPixelFormat(1024, 768, 32, 24, 8);
	
	//game init

	
	while(MessageHandler() == true)
	{
		//main game loop

	}
	
	//game shutdown

	
	wndDestroyWindow();
	
	return 0;
}
 
 
 
LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch(msg)
	{	
		case WM_DESTROY:
			PostQuitMessage(0);
			return false;
			break;
	
		case WM_SYSCOMMAND:
			switch(lParam)
			{
				case SC_SCREENSAVE:
				case SC_MONITORPOWER:
				default: break;
			}
			break;
		
		case WM_CLOSE:
			PostQuitMessage(0);
			return false;
			break;
		
		case WM_SIZE:
			//ResizeGLScene(LOWORD(lparam),HIWORD(lparam));

			return false;
			break;
		
		default:break; 
	} 
	
	return DefWindowProc(hWnd, msg, wParam, lParam);
}
 
 
 
bool MessageHandler(void)
{
	MSG msg;
	
	while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
	{ 
	    TranslateMessage(&msg);
	    DispatchMessage(&msg); 
		
		if(msg.message == WM_QUIT)
		{
			return false;
		}
	}
	
	return true;
}
 
 
 
unsigned short wndRegisterClass(void)
{
	WNDCLASS wndClass;
	
	wndClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
	wndClass.lpfnWndProc = (WNDPROC) WndProc;
	wndClass.cbClsExtra = 0;
	wndClass.cbWndExtra = 0;
	wndClass.hInstance = hInstance;
	wndClass.hIcon = LoadIcon(NULL, IDI_WINLOGO);
	wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndClass.hbrBackground = NULL;
	wndClass.lpszMenuName = NULL;
	wndClass.lpszClassName = "Game";
	
	return RegisterClass(&wndClass);
}
 
 
 
bool wndChangeDisplayMode(long Width, long Height, long ColorBits)
{
	DEVMODE dmScreenSettings;
	
	ZeroMemory (&dmScreenSettings, sizeof(dmScreenSettings));
	
	dmScreenSettings.dmSize = sizeof(dmScreenSettings);
	dmScreenSettings.dmPelsWidth = Width;
	dmScreenSettings.dmPelsHeight = Height;
	dmScreenSettings.dmBitsPerPel = ColorBits;
	dmScreenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
	
	return (ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN) == DISP_CHANGE_SUCCESSFUL);
}
 
 
 
HWND wndCreateWindow(long Width, long Height)
{
	DWORD dwExStyle;
	DWORD dwStyle;
	RECT WindowRect;
	
	dwExStyle = WS_EX_APPWINDOW;
	dwStyle = WS_POPUP;
	
	ShowCursor(FALSE);
	
	AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle);
	
	return CreateWindowEx(dwExStyle, "Game", "Game", dwStyle | WS_CLIPSIBLINGS | WS_CLIPCHILDREN, 0, 0, Width, Height, NULL, NULL, hInstance, NULL);
}
 
 
 
void wndSetPixelFormat(long Width, long Height, char ColorBits, char DepthBits, char StencilBits)
{
	PIXELFORMATDESCRIPTOR pfd;
	
	ZeroMemory(&pfd, sizeof(pfd));
	
	pfd.nSize = sizeof(pfd);
	pfd.nVersion = 1;
	pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
	pfd.iPixelType = PFD_TYPE_RGBA;
	pfd.cColorBits = ColorBits;
	pfd.cRedBits = 0;
	pfd.cRedShift = 0;
	pfd.cGreenBits = 0;
	pfd.cGreenShift = 0;
	pfd.cBlueBits = 0;
	pfd.cBlueShift = 0;
	pfd.cAlphaBits = 0;
	pfd.cAlphaShift = 0;
	pfd.cAccumBits = 0;
	pfd.cAccumRedBits = 0;
	pfd.cAccumGreenBits = 0;
	pfd.cAccumBlueBits = 0;
	pfd.cAccumAlphaBits = 0;
	pfd.cDepthBits = DepthBits;
	pfd.cStencilBits = StencilBits;
	pfd.cAuxBuffers = 0;
	pfd.iLayerType = PFD_MAIN_PLANE;
	pfd.bReserved = 0;
	pfd.dwLayerMask = 0;
	pfd.dwVisibleMask = 0;
	pfd.dwDamageMask = 0;
	
	int PixelFormat = ChoosePixelFormat(hDC, &pfd);
	SetPixelFormat(hDC,PixelFormat, &pfd);
	
	hRC = wglCreateContext(hDC);
	wglMakeCurrent(hDC,hRC);
	
	ShowWindow(hWnd, SW_SHOW);
	SetForegroundWindow(hWnd);
	SetFocus(hWnd);
	
	ReSizeGLScene(Width, Height);
	
	glClearColor(0.0f, 0.0f, 0.5f, 0.0f);
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	
	SwapBuffers(hDC);
}
 
 
 
void wndDestroyWindow(void)
{
	ChangeDisplaySettings(NULL, 0);
	ShowCursor(TRUE);
	
	wglMakeCurrent(NULL, NULL);
	wglDeleteContext(hRC);
	hRC = NULL;
	
	ReleaseDC(hWnd, hDC);
	hDC = NULL;
	
	DestroyWindow(hWnd);
	hWnd=NULL;
	
	UnregisterClass("OpenGL", hInstance);
	hInstance = NULL;
}