学习的开始:HelloWorld!

#include <windows.h>
//#pragma   comment(lib,   "winmm.lib")
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);

int __stdcall WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{
    static TCHAR szAppName[]=TEXT("HelloWin");
    HWND hwnd;
    MSG msg;
    WNDCLASS wndclass;

    wndclass.style=CS_HREDRAW|CS_VREDRAW;
    wndclass.lpfnWndProc=WndProc;
    wndclass.cbClsExtra=0;
    wndclass.cbWndExtra=0;
    wndclass.hInstance=hInstance;
    wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
    wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
    wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName=NULL;
    wndclass.lpszClassName=szAppName;
    if (!RegisterClass(&wndclass))
    {
        MessageBox(NULL,TEXT("This program requires Windows NT!"),
            szAppName,MB_ICONERROR);
        return 0;
    }
    hwnd=CreateWindow(szAppName,
        TEXT("The Hello Program"),
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        NULL,
        NULL,
        hPrevInstance,
        NULL);

    ShowWindow(hwnd,nShowCmd);
    UpdateWindow(hwnd);

    while(GetMessage(&msg,hwnd,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return int(msg.wParam);
}

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM  wParam,LPARAM lParam)
{
    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);
        GetClientRect(hwnd,&rect);
        DrawText(hdc,TEXT("Hello,Windows XP!"),-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);
        EndPaint(hwnd,&ps);
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd,message,wParam,lParam);
}