windows api 程式

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#include "StdAfx.h"#include<windows.h>#include<mmsystem.h>LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);int WINAPI WinMain(HINSTANCE  hinstance,HINSTANCE hPrevinstance,PSTR szCmdLine,int iCmdShow){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 requiers Windows NT!"),szAppName,MB_ICONERROR);return 0;}hwnd=CreateWindow(szAppName,//window class nameTEXT("The Hello Program"),//window captionWS_OVERLAPPEDWINDOW,//window styleCW_USEDEFAULT,//INITIAL X POSITIONCW_USEDEFAULT,//INITIAL  Y  positionCW_USEDEFAULT,//initial x sizeCW_USEDEFAULT,//initial y sizeNULL,//parent window handleNULL, //Window menu handlehinstance,//program instance handleNULL);ShowWindow(hwnd,iCmdShow);UpdateWindow(hwnd);while(GetMessage(&msg,NULL,0,0)){TranslateMessage(&msg);DispatchMessage(&msg);}return msg.wParam;}LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM IParam){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"),-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,IParam);}

　　

windows api 程式