int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR     lpCmdLine,
int       nCmdShow)
{
// TODO: Place code here.
MSG msg;
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow)) 
{
return FALSE;
}
// Main message loop:
while (GetMessage(&msg, NULL, 0, 0)) 
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX); 
wcex.style   = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc  = (WNDPROC)WndProc;
wcex.cbClsExtra  = 0;
wcex.cbWndExtra  = 0;
wcex.hInstance  = hInstance;
wcex.hIcon   = LoadIcon(hInstance, (LPCTSTR)IDI_MOUSEMOVE);
wcex.hCursor   = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "MouseMove";
wcex.hIconSm   = LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);
return RegisterClassEx(&wcex);
}
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd;
hInst = hInstance; // Store instance handle in our global variable
hWnd = CreateWindow(  "MouseMove", 
"实时鼠标位置", WS_OVERLAPPEDWINDOW,
     CW_USEDEFAULT,
0, 
CW_USEDEFAULT, 
0, 
NULL, 
NULL, 
hInstance, 
NULL);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}  

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc;
POINT pt;
CHAR szString[255];
switch (message) 
{
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_MOUSEMOVE:     //响应鼠标的移动
pt.x = LOWORD(lParam); //取得x的坐标
pt.y = HIWORD(lParam); //取得y的坐标
//空格的目的是保证显示的正确性。sprintf函数目的是将需要输出
//的信息转换成字符串
sprintf( szString, "[ %d,  %d ]   ", pt.x, pt.y );
hdc = GetDC( hWnd );
//输出字符串
TextOut( hdc, 300, 200, szString, strlen( szString ) );
ReleaseDC( hWnd, hdc );
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}