创建一个完整的窗口需要的步骤：4步_mtk6261d 如何新建一个窗口-优快云博客

本文介绍了一个简单的Windows窗口程序实现过程，包括窗口类的设计、注册、创建及显示等关键步骤，并展示了如何通过消息循环响应用户的输入。

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创建一个完整的窗口需要下面四个步骤：

1.设计一个窗口类；

2.注册窗口类；

3.创建窗口；

4.显示和更新窗口。

#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(BLACK_BRUSH);
   wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
   wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
   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,
       0,0,600,400,NULL,NULL,hInstance,NULL);

   ShowWindow(hwnd,SW_SHOWNORMAL);
   UpdateWindow(hwnd);

    //下面是消息循环
   MSG msg;
   while(GetMessage(&msg,NULL,0,0))
   {
       TranslateMessage(&msg);
       DispatchMessage(&msg);
   }
   return 0;
}

//下面是窗口过程函数
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;
}