Lesson1

#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; //设计窗口类wndcls.cbClsExtra=0;wndcls.cbWndExtra=0;wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);wndcls.hIcon=LoadIcon(NULL,IDI_INFORMATION);wndcls.hInstance=hInstance;wndcls.lpfnWndProc=WinSunProc;wndcls.lpszClassName="WinClass";wndcls.lpszMenuName=NULL;wndcls.style=CS_HREDRAW | CS_VREDRAW;RegisterClass(&wndcls); //注册窗口类HWND hwnd;hwnd=CreateWindow("WinClass","Windows class demon",WS_OVERLAPPEDWINDOW,0,0,600,400,NULL,NULL,hInstance,NULL); //产生窗口ShowWindow(hwnd,SW_SHOWNORMAL); //显示窗口UpdateWindow(hwnd); //更新窗口MSG msg; //消息循环while(GetMessage(&msg,NULL,0,0)){TranslateMessage(&msg); //转换按键消息为WM_CHAR消息，产生新消息，放到消息队列DispatchMessage(&msg); //将收到的消息传到回调函数，进行处理}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_CHAR:char szChar[20];sprintf(szChar,"char is %d",wParam);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_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_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;}