wndcls.lpszClassName ="2017";的名稱不能太長，如果長了就容易出錯 #include <windows.h> #include <stdio.h>LRESULT CALLBACK WinSunProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam) ; //窗口處理函數WinSunPro();聲明 int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow) {//設計一個窗口類WNDCLASS wndcls;wndcls.cbClsExtra=0; //窗口類外加內存wndcls.cbWndExtra=0; //窗口外加內存wndcls.hbrBackground= (HBRUSH)GetStockObject(BLACK_BRUSH) ;//類型轉換wndcls.hCursor=LoadCursor(NULL,IDC_CROSS); //wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);//wndcls.hInstance=hInstance; //應用程序的實例句柄，由WinMain函數傳遞過來wndcls.lpfnWndProc=WinSunProc;wndcls.lpszClassName ="2017";wndcls.lpszMenuName=NULL;wndcls.style=CS_HREDRAW | CS_VREDRAW;RegisterClass(&wndcls);HWND hwnd;hwnd=CreateWindow("2017","北京創新中心",WS_OVERLAPPEDWINDOW,0,0,600,400,NULL,NULL,hInstance,NULL);ShowWindow(hwnd,SW_SHOWNORMAL);UpdateWindow(hwnd); //向消息相應處理函數發送一個WM_PAINT的消息MSG msg;while(GetMessage(&msg,NULL,0,0)) //三四個參數為消息過濾器min-max{TranslateMessage(&msg);DispatchMessage(&msg);}return 0;}LRESULT CALLBACK WinSunProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam) {switch(uMsg){case WM_CHAR:char szChar[20];sprintf(szChar,"char code is %d",wParam);MessageBox(hwnd,szChar,"char",0) ;break;case WM_LBUTTONDOWN:MessageBox(hwnd,"mouse clicked","message",0);HDC hdc;hdc=GetDC(hwnd);TextOut(hdc,0,50,"程序員之家",strlen("程序員之家"));ReleaseDC(hwnd,hdc);break;case WM_PAINT:HDC hDc;PAINTSTRUCT ps;hDc = BeginPaint(hwnd,&ps);TextOut(hDc,0,0,"維新培訓",strlen("維新培訓"));EndPaint(hwnd,&ps);break;case WM_CLOSE:if(IDYES==MessageBox(hwnd,"是否真的結束？","message",MB_YESNO)){DestroyWindow(hwnd);}break;case WM_DESTROY:PostQuitMessage(0);break;default:return DefWindowProc(hwnd,uMsg,wParam,lParam);}return 0; }

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