Windows应用程序:
WinMain函数(入口函数):
1。设计窗口类,注册窗口类;WNDCLASS
2。创建窗口,显示及更新窗口;
3。消息循环;
窗口过程函数(回调函数):WindowProc
PS:Dos程序入口函数为main,Windows程序入口为WinMain,都是由系统直接调用。
windows程序运行过程
#include<windows.h> #include<stdio.h> LRESULT CALLBACK WinSunProc( //窗口过程函数(回调函数)声明 HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ); int WINAPI WinMain( //WinMain函数,windows应用程序的入口 HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow ) { WNDCLASS wndcls; //实例化一个窗口类对象,并设置各个属性 wndcls.cbClsExtra = 0; wndcls.cbWndExtra = 0; wndcls.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); wndcls.hCursor = LoadCursor(NULL,IDC_CROSS); wndcls.hIcon = LoadIcon(NULL,IDI_ERROR); wndcls.hInstance = hInstance; wndcls.lpfnWndProc = WinSunProc; wndcls.lpszClassName = "hepengtao"; wndcls.lpszMenuName = NULL; wndcls.style = CS_HREDRAW | CS_VREDRAW; RegisterClass(&wndcls); //注册窗口类 HWND hwnd; hwnd = CreateWindow("hepengtao","窗口标题",WS_OVERLAPPEDWINDOW, //创建窗口 0,0,600,400,NULL,NULL,hInstance,NULL); ShowWindow(hwnd,SW_SHOWNORMAL); //显示窗口 UpdateWindow(hwnd); //更新窗口 MSG msg; while(GetMessage(&msg,NULL,0,0)) //从消息队列中取出消息,当得到 WM_QUIT 消息时返回0 { TranslateMessage(&msg);//按下键盘按键时,系统得到 WM_KEYDOWN 和 WM_KEYUP 消息,经过该函数转变为 WM_CHAR 消息 DispatchMessage(&msg); //将得到的消息传递给回调函数 } return 0; } LRESULT CALLBACK WinSunProc( //定义窗口过程函数(回调函数) HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ) { switch(uMsg) { case WM_CHAR: //键盘按下字母后,发送 WM_CHAR 消息 char szChar[20]; sprintf(szChar,"char is %d",wParam); MessageBox(hwnd,szChar,"弹窗标题",0); break; case WM_LBUTTONDOWN: //鼠标左键按下后,发送 WM_LBUTTONDOWN 消息 MessageBox(hwnd,"mouse clicked","弹窗标题",0); HDC hdc; hdc = GetDC(hwnd); TextOut(hdc,0,50,"I am hepengtao.",strlen("I am hepengtao.")); ReleaseDC(hwnd,hdc); break; case WM_PAINT: //窗口重绘时,发送 WM_PAINT 消息 HDC hDC; PAINTSTRUCT ps; hDC = BeginPaint(hwnd,&ps); TextOut(hDC,0,0,"Hello,world!",strlen("Hello,world!")); EndPaint(hwnd,&ps); break; case WM_CLOSE: //关闭按钮按下后,发送 WM_CLOSE 消息 if(IDYES == MessageBox(hwnd,"确定要关闭窗口?" ,"弹窗标题",MB_YESNO)) { DestroyWindow(hwnd); //销毁窗口,并发送 WM_DESTORY 消息 } break; case WM_DESTROY: //执行DestoryWindow()函数时,发送 WM_DESTORY 消息 PostQuitMessage(0); //程序请求退出,发送 WM_QUIT 消息 break; default: return DefWindowProc(hwnd,uMsg,wParam,lParam); //用户不关心的消息,由操作系统缺省处理 } return 0; }
原文地址:http://blog.csdn.net/crazy_xiaohe/article/details/40820189