//全局变量
HINSTANCE hInst;
HBITMAP bg,angrybird;
HDC hdc,mdc,bufdc;
HWND hWnd;
DWORD tPre,tNow,tCheck;
RECT rect;
int x=0,y=100,vx=10,vy=0;//初始横坐标x=0，初始纵坐标y=100，初始水平方向速度vx=10，初始竖直方向速度vy=0）

int gy=2,fx=-1,fy=-4; //重力加速度gy=2，x方向摩擦力为-1，f方向摩擦力为-4

//全局函数
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
void MyPaint(HDC hdc);

//****WinMain函数，程序入口点函数************************************** *
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
MSG msg;

MyRegisterClass(hInstance);

//初始化
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}

//消息循环
GetMessage(&msg,NULL,NULL,NULL); //初始化msg
while( msg.message!=WM_QUIT )
{
if( PeekMessage( &msg, NULL, 0,0 ,PM_REMOVE) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else
{
tNow = GetTickCount();
if(tNow-tPre >= 50)
MyPaint(hdc);
}
}

return msg.wParam;
}

//****设计一个窗口类，类似填空题，使用窗口结构体*********************
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 = NULL;
wcex.hCursor = NULL;
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "maple";
wcex.hIconSm = NULL;

return RegisterClassEx(&wcex);
}

//****初始化函数*************************************
// 1.加载位图资源
// 2.取得内部窗口区域信息
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HBITMAP bmp;
hInst = hInstance;

hWnd = CreateWindow("maple", "浅墨的窗口" , WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

if (!hWnd)
{
return FALSE;
}

MoveWindow(hWnd,10,10,750,420,true);
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);