main.cpp

一本关于OPenGL的很好的电子书

#define WIN32_LEAN_AND_MEAN				// trim the excess fat from Windows

#include <windows.h>					// standard Windows app include

// the Windows Procedure event handler
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	PAINTSTRUCT paintStruct;
	HDC hDC;							// device context
	char string[] = "Hello, world!";		// text to be displayed

	switch(message)
	{
		case WM_CREATE:				// window is being created
			return 0;
			break;

		case WM_CLOSE:					// windows is closing
			PostQuitMessage(0);
			return 0;
			break;

		case WM_PAINT:					// window needs updating
			hDC = BeginPaint(hwnd, &paintStruct);
			SetTextColor(hDC, COLORREF(0x00FF0000));			// set text color to blue
			TextOut(hDC, 150, 150, string, sizeof(string)-1);	// display text in middle of window
			EndPaint(hwnd, &paintStruct);
			return 0;
			break;

		default:
			break;
	}

	return (DefWindowProc(hwnd, message, wParam, lParam));
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
	WNDCLASSEX windowClass;		// window class
	HWND	   hwnd;			// window handle
	MSG		   msg;				// message
	bool	   done;			// flag saying when our app is complete

	// fill out the window class structure
	windowClass.cbSize			= sizeof(WNDCLASSEX);
	windowClass.style			= CS_HREDRAW | CS_VREDRAW;
	windowClass.lpfnWndProc		= WndProc;
	windowClass.cbClsExtra		= 0;
	windowClass.cbWndExtra		= 0;
	windowClass.hInstance		= hInstance;
	windowClass.hIcon			= LoadIcon(NULL, IDI_APPLICATION);			// default icon
	windowClass.hCursor			= LoadCursor(NULL, IDC_ARROW);				// default arrow
	windowClass.hbrBackground	= (HBRUSH)GetStockObject(WHITE_BRUSH);		// white background
	windowClass.lpszMenuName	= NULL;										// no menu
	windowClass.lpszClassName	= "MyClass";
	windowClass.hIconSm			= LoadIcon(NULL, IDI_WINLOGO);			// windows logo small icon

	// register the windows class
	if (!RegisterClassEx(&windowClass))
		return 0;

	// class registered, so now create our window
	hwnd = CreateWindowEx(NULL,								// extended style
						  "MyClass",						// class name
						  "A REAL Windows Application!",	// app name
						  WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_SYSMENU,	// style
						  100, 100,							// x,y coordinate
						  400, 400,							// width, height
						  NULL,								// handle to parent
						  NULL,								// handle to menu
						  hInstance,						// application instance
						  NULL);							// no extra params

	// check if window creation failed (hwnd would equal NULL)
	if (!hwnd)
		return 0;

	done = false;						// intialize the loop condition variable

	// main message loop
	while (!done)
	{
		PeekMessage(&msg, hwnd, NULL, NULL, PM_REMOVE);

		if (msg.message == WM_QUIT)		// do we receive a WM_QUIT message?
		{
			done = true;				// if so, time to quit the application
		}
		else
		{
			TranslateMessage(&msg);		// translate and dispatch to event queue
			DispatchMessage(&msg);
		}
	}

	return msg.wParam;
}