#define WIN32_LEAN_AND_MEAN// The main windows include file#include <windows.h>#include <stdlib.h>int GameInit();int GameLoop();int GameShutdown();HDC g_hDC;HWND g_hWndMain;// The window procedure to handle eventslong CALLBACK WndProc( HWND hWnd, UINT uMessage,                                 WPARAM wParam, LPARAM lParam ){	PAINTSTRUCT PaintStruct;	// Structure used during windows painting	HDC hDC;	static HBITMAP hBitmap = 0;// Handle to device context for painting	// Switch the windows message to figure out what it is	switch( uMessage )	{		case WM_CREATE:	// The CreateWindow() function was just called		{			//  One Time Initialization						return 0;		}		case WM_PAINT:	// The window needs to be redrawn		{			// Tell windows we want to start updating the window			hDC = BeginPaint( hWnd, &PaintStruct );									//Tell windows we have finished updating the window			EndPaint( hWnd, &PaintStruct );			return 0;		}				case WM_DESTROY:	// The window is about to be closed		{			// Our main window is closing.  This means we want our app to exit.			// Tell windows to put a WM_QUIT message in our message queue									PostQuitMessage( 0 );			return 0;		}		case WM_LBUTTONDOWN:			{				bDraw = TRUE;				return 0;			}		case WM_LBUTTONUP:			{				bDraw = FALSE;				return 0;			}		case WM_MOUSEMOVE:			{				HDC hDC = GetDC(g_hWndMain);				static int xPos = LOWORD(lParam);				static int yPos = HIWORD(lParam);				if(bDraw)				{					MoveToEx(hDC,xPos,yPos,NULL);					LineTo(hDC, LOWORD(lParam), HIWORD(lParam));				}				xPos = LOWORD(lParam);				yPos = HIWORD(lParam);				ReleaseDC(g_hWndMain, hDC);				return 0;			}				case WM_CHAR:			{				switch(wParam)				{				case 'x':					{						PostQuitMessage(0);						break;					}				default:					break;				}				return 0;			}		default:			// Some other message		{			// Let windows handle this message			return DefWindowProc( hWnd, uMessage, wParam, lParam );		}	}}// The windows entry point. The application will start executing hereint WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,                                     PSTR pstrCmdLine, int iCmdShow ){	HWND hWnd;		// The handle to our main window	MSG msg;		// The message windows is sending us	WNDCLASSEX wc;	// The window class used to create our window	// The name of our class and also the title to our window	static char strAppName[] = "First Windows App, CGM style";	//LOGBRUSH CrossHatchBrush;	//CrossHatchBrush.lbStyle = BS_HATCHED;	//CrossHatchBrush.lbColor = RGB(255,0,255);	//CrossHatchBrush.lbHatch = HS_DIAGCROSS;	//HBRUSH hCrossBrush = CreateBrushIndirect(&CrossHatchBrush);		// Fill in the window class with the attributes for our main window	// The size of this struture in bytes	wc.cbSize			= sizeof( WNDCLASSEX );		//  The style of the window.	wc.style			= CS_HREDRAW | CS_VREDRAW | CS_OWNDC;	// Useless information.  Just set to zero.	wc.cbClsExtra		= 0;	// Useless information.  Just set to zero.	wc.cbWndExtra		= 0;	// The name of our event handler	wc.lpfnWndProc		= WndProc;	// A handle to the applications instance	wc.hInstance		= hInstance;	// The handle to the brush to use for the window background	wc.hbrBackground	= (HBRUSH)GetStockObject(DKGRAY_BRUSH);	// A handle to the icon to use for the window	wc.hIcon			= LoadIcon( NULL, IDI_APPLICATION );	// A handle to a smaller version of the apps icon	wc.hIconSm			= LoadIcon( NULL, IDI_APPLICATION );	// A handle to the cursor to use while the mouse is over our window	wc.hCursor			= LoadCursor( NULL, IDC_CROSS );	// A handle to the resource to use as our menu	wc.lpszMenuName		= NULL;	// The human readable name for this class	wc.lpszClassName	= strAppName;	// Register the class with windows	RegisterClassEx( &wc );	// Create the window based  on the previous class	hWnd = CreateWindowEx( NULL,	// Advanced style settings	            strAppName,			// The name of the class				strAppName,			// The window caption				WS_OVERLAPPEDWINDOW,// The window style			   	CW_USEDEFAULT,		// The initial x position                 CW_USEDEFAULT,		// The initial y position			   	900, 900,			// The intiial width / height				NULL,				// Handle to parent window										NULL,				// Handle to the menu				hInstance,			// Handle to the apps instance				NULL );				// Advanced context	g_hWndMain = hWnd;			GameInit();	// Display the window we just created	ShowWindow( hWnd, iCmdShow );	// Draw the window contents for the first time	UpdateWindow( hWnd );		// Start the message loop	while( TRUE )	{		// Check if a message is waiting for processing		if( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) )		{			// Check if the message is to quit the application			if( msg.message == WM_QUIT )				// Exit the message loop				break;						// Change the format of certain messages			TranslateMessage( &msg );			// Pass the message to WndProc() for processing			DispatchMessage( &msg );		}		else		{			GameLoop();		}		}	GameShutdown();	// Return control to windows with the exit code	return msg.wParam;}		int GameInit()	{		return 0;		}	int GameLoop()	{	return 0;	}		int GameShutdown()	{			return 0;	}