#include <windows.h>

//函數聲明
BOOL InitWindow( HINSTANCE hInstance, int nCmdShow );
LRESULT CALLBACK WinProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam );

//變量說明
HWND hWnd; //窗口句柄
//************************************************************
//函數：WinMain( )
//功能：Windows程序入口函數。創建主窗口，處理消息循環
//************************************************************
int PASCAL WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    if ( !InitWindow( hInstance, nCmdShow ) ) 
		return FALSE; //創建主窗口
    //如果創建不成功則返回FALSE并同時退出程序
    MSG msg;
    //進入消息循環：
    for(;;)
	{
	    if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
		{
		    if ( msg.message==WM_QUIT) 
				break;
		    TranslateMessage(&msg); 
		    DispatchMessage(&msg);
		}
	}
    return msg.wParam;
}


//************************************************************
//函數：InitWindow( )
//功能：創建窗口
//************************************************************

static BOOL InitWindow( HINSTANCE hInstance, int nCmdShow )
{
	//定義窗口風格：
	WNDCLASS wc; 
	wc.style = NULL;
	wc.lpfnWndProc = (WNDPROC)WinProc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hInstance = hInstance;
	wc.hIcon = NULL;
	wc.hCursor = NULL;
	wc.hbrBackground = CreateSolidBrush (RGB(100, 0, 0)); //暗紅色的背景
	wc.lpszMenuName = NULL;
	wc.lpszClassName = "My_Test";
	RegisterClass(&wc);//注冊窗口
    //按所給參數創造窗口
    hWnd = CreateWindow("My_Test",
            "My first program",
            WS_POPUP|WS_MAXIMIZE,0,0,
            GetSystemMetrics( SM_CXSCREEN ), //此函數返回屏幕寬度
            GetSystemMetrics( SM_CYSCREEN ), //此函數返回屏幕高度
            NULL,NULL,hInstance,NULL);
	if( !hWnd ) return FALSE;
	ShowWindow(hWnd,nCmdShow);//顯示窗口
	UpdateWindow(hWnd);//刷新窗口
	return TRUE;
}


//************************************************************
//函數：WinProc( )
//功能：處理窗口消息
//************************************************************

LRESULT CALLBACK WinProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
{
    switch( message )
	{
        case WM_KEYDOWN://擊鍵消息
        switch( wParam )
		{
            case VK_ESCAPE:
            MessageBox(hWnd,"ESC鍵按下了! 確定后退出!","Keyboard",MB_OK);
            PostMessage(hWnd, WM_CLOSE, 0, 0);//給窗口發送WM_CLOSE消息
            break;
		}
        return 0; //處理完一個消息后返回0

		case WM_CLOSE: //準備退出
		DestroyWindow( hWnd ); //釋放窗口
		return 0;

        case WM_RBUTTONDOWN:
        MessageBox(hWnd,"鼠標右鍵按下了!","Mouse",MB_OK);
        return 0;

	    case WM_DESTROY: //如果窗口被人釋放…
	    PostQuitMessage( 0 ); //給窗口發送WM_QUIT消息
	    return 0;
	}
    
	//調用缺省消息處理過程
    return DefWindowProc(hWnd, message, wParam, lParam); 
}