HELLOWIN（2）

来源：互联网发布：集体智慧编程编辑：程序博客网时间：2024/06/05 12:02

此例题来自3.1.2 完整创建一个窗口，且能处理函数，中间自己期间遇到些问题，

比方说CreateWindow函数少一个参数，比方说callback函数写错引发c4330错误，还有后面WM_CREATE中

PlaySound

引发 error LNK2001: 无法解析的外部符号 __imp__PlaySoundA@12错误，主要原因就是自己在目录下根本就没有这个文件，自然要引发错误！

中的总体还是能顺利编译程序，对程序的具体还需要我自己慢慢理解：

#include <Windows.h>LRESULT CALLBACK WndProc (HWND, UINT,WPARAM, LPARAM);int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,               PSTR szCmdLine,int iCmdShow){//LRESULT CALLBACKE WndPro(HWND, UINT,WPARAM, LPARAM);static TCHAR szAppName[]=TEXT("HeeloWin");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.lpszClassName           =szAppName;wndclass.lpszMenuName            =NULL;if(!RegisterClass(&wndclass)){MessageBox(NULL,TEXT("this program requries window 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,  hInstance,  NULL);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 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 7"),-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);}

效果图：