一直比較關(guān)注本質(zhì)的東西。VC封裝了很多，想了解一下比較麻煩。

先從了解WinMain()入口函數(shù)與WndProc()消息處理函數(shù)開(kāi)始吧。

大氣象 #include?<windows.h>
#include?<mmsystem.h>
LRESULT?CALLBACK?WndProc?(HWND,?UINT,?WPARAM,?LPARAM);?//聲名消息處理函數(shù)(處理windows和接收windows消息)
//hInstance:系統(tǒng)為窗口分配的實(shí)例號(hào),2和3忘了.4是顯示方式
int?WINAPI?WinMain?(HINSTANCE?hInstance,?HINSTANCE?hPrevInstance,PSTR?szCmdLine,?int?iCmdShow)
{
????static?TCHAR?szAppName[]?=?TEXT?("HelloWin")?;?//窗體名
????HWND?hwnd;//句柄
????MSG?msg;//消息體
????WNDCLASS?wndclass;//這義一個(gè)窗體類實(shí)例
????//設(shè)置窗體參數(shù)
????wndclass.style?=?CS_HREDRAW?|?CS_VREDRAW?;?//樣式
????wndclass.cbClsExtra???=?0?;
????wndclass.cbWndExtra???=?0?;
????wndclass.hInstance?=?hInstance?;//窗體實(shí)例名，由windows自動(dòng)分發(fā)
????wndclass.hIcon?=?LoadIcon?(NULL,?IDI_APPLICATION)?;//顯示上面的圖標(biāo)titlte
????wndclass.hCursor?=?LoadCursor?(NULL,?IDC_ARROW)?;//窗口光標(biāo)
????wndclass.hbrBackground=?(HBRUSH)?GetStockObject?(WHITE_BRUSH)?;//背景刷
????wndclass.lpszMenuName=NULL;
????wndclass.lpfnWndProc=WndProc;//設(shè)置窗體接收windws消息函數(shù)
????wndclass.lpszClassName=?szAppName;//窗體類名
????if?(!RegisterClass?(&wndclass))//注冊(cè)窗體類
????{
????????MessageBox?(?NULL,?TEXT?("This?program?requires?Windows?NT!"),?szAppName,?MB_ICONERROR)?;
????????return?0?;
????};
????//創(chuàng)建一個(gè)窗體。已分配內(nèi)存。返回一個(gè)窗體句柄
????hwnd?=?CreateWindow(?szAppName,??????//?window?class?name
????????TEXT?("The?Hello?Program"),???//?window?caption
????????WS_OVERLAPPEDWINDOW,?//?window?style
????????CW_USEDEFAULT,//?initial?x?position
????????CW_USEDEFAULT,//?initial?y?position
????????CW_USEDEFAULT,//?initial?x?size
????????CW_USEDEFAULT,//?initial?y?size
????????NULL,?//?parent?window?handle
????????NULL,?//?window?menu?handle
????????hInstance,?//?program?instance?handle
????????NULL)?;
????ShowWindow?(hwnd,iCmdShow);//顯示窗口
????UpdateWindow?(hwnd)?;//更新窗體
????while(GetMessage(&msg,NULL,0,0))
????{
????????TranslateMessage?(&msg);//翻譯消息并發(fā)送到windows消息隊(duì)列
????????DispatchMessage?(&msg)?;//接收信息
????}
????return?msg.wParam?;
}

LRESULT?CALLBACK?WndProc?(HWND?hwnd,?UINT?message,?WPARAM?wParam,?LPARAM?lParam)//消息的處理程序

{

????HDC???????????????????hdc?;

????PAINTSTRUCT?ps?;

????RECT??????????rect?;


????switch?(message)

????{

????case?WM_CREATE:
????????//PlaySound(TEXT("HelloWin.wav"),NULL,SND_FILENAME|SND_ASYNC);

????????return?0?;


????case???WM_PAINT:

????????hdc?=?BeginPaint?(hwnd,?&ps)?;
????????TextOut(hdc,0,0,"大氣象",strlen("大氣象"));
????????EndPaint?(hwnd,?&ps)?;

????????return?0?;


????case???WM_DESTROY:

????????PostQuitMessage?(0)?;

????????return?0?;

????}

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

}

?新建Visual C++空項(xiàng)目。在源文件目錄里新建一個(gè)cpp文件。

輸入以上代碼，直接運(yùn)行。如圖：

總結(jié)

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