yuanli.rar_windowsyuanli_回调函数_消息队列

#include <windows.h> #include <stdio.h> LRESULT CALLBACK WinSunProc( HWND hwnd, // handle to window UINT uMsg, // message identifier WPARAM wParam, // first message parameter LPARAM lParam // second message parameter ); int WINAPI WinMain( HINSTANCE hInstance, // handle to current instance HINSTANCE hPrevInstance, // handle to previous instance LPSTR lpCmdLine, // command line int nCmdShow // show state ) { WNDCLASS wndcls; wndcls.cbClsExtra=0; wndcls.cbWndExtra=0; wndcls.hbrBackground=(HBRUSH)GetStockObject(SYSTEM_FONT); wndcls.hCursor=LoadCursor(NULL,IDC_ICON); wndcls.hIcon=LoadIcon(NULL,IDI_WINLOGO); wndcls.hInstance=hInstance; wndcls.lpfnWndProc=WinSunProc; wndcls.lpszClassName="Weixin2003"; wndcls.lpszMenuName=NULL; wndcls.style=CS_HREDRAW | CS_VREDRAW; RegisterClass(&wndcls); HWND hwnd; hwnd=CreateWindow("Weixin2003","北京维新科学技术培训中心",WS_OVERLAPPEDWINDOW/* & ~WS_MAXIMIZEBOX*/, 0,0,600,400,NULL,NULL,hInstance,NULL); ShowWindow(hwnd,SW_SHOWNORMAL); UpdateWindow(hwnd); MSG msg; while(GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return 0; } LRESULT CALLBACK WinSunProc( HWND hwnd, // handle to window UINT uMsg, // message identifier WPARAM wParam, // first message parameter LPARAM lParam // second message parameter ) { switch(uMsg) { case WM_PAINT: HDC hDC; PAINTSTRUCT ps; hDC=BeginPaint(hwnd,&ps); TextOut(hDC,0,0,"维新培训",strlen("维新培训")); EndPaint(hwnd,&ps); break; case WM_CHAR: char szChar[20]; sprintf(szChar,"char is %d",wParam);//，不是输出，而是格式化文本到内存buffer中 MessageBox(hwnd,szChar,"weixin",0); break; case WM_LBUTTONDOWN: MessageBox(hwnd,"mouse clicked","weixin",0); HDC hdc; hdc=GetDC(hwnd); TextOut(hdc,0,50,"计算机编程语言培训",strlen("计算机编程语言培训")); ReleaseDC(hwnd,hdc); break; case WM_CLOSE: if(IDYES==MessageBox(hwnd,"是否真的结束？","weixin",MB_YESNO)) { DestroyWindow(hwnd); } break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hwnd,uMsg,wParam,lParam); } return 0; }