vc 向外部窗体发送空格键、和方向键

最新推荐文章于 2021-07-30 14:40:06 发布

寒月望山

最新推荐文章于 2021-07-30 14:40:06 发布

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文章标签： null windows

本文链接：https://blog.youkuaiyun.com/lltaoyy/article/details/5859786

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本文展示了如何使用C++编程向Windows组件向导窗口中的ListBox发送键盘事件，具体包括发送空格键和方向键（40对应向下键）。通过FindWindow和FindWindowEx函数定位目标窗口及控件，然后利用PostMessage发送WM_KEYDOWN消息模拟按键行为。

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#include<windows.h>
#include<tchar.h>
#include<iostream>
using namespace std;
HWND _FindWindow(LPCTSTR lpClassName,
                 LPCTSTR lpWindowName);
HWND _FindWindowEx(HWND hwndParent,
                   HWND hwndChildAfter,
                   LPCTSTR lpszClass,
                   LPCTSTR lpszWindow);
void main()
{
const int WM_CLICK= 0x00F5;
// ShellExecute(NULL,"open","calc.exe",NULL,NULL,SW_SHOW);
   HWND hWnd=_FindWindow("#32770","Windows 组件向导");
   HWND ChWnd=_FindWindowEx(hWnd,NULL,"#32770","");
   HWND hList=_FindWindowEx(ChWnd,NULL,"ListBox","");
   //::PostMessage(hList,WM_CLICK,0,0);
   //::PostMessage(hList, WM_KEYDOWN, 0x20, NULL);
   ::PostMessage(hList, WM_KEYDOWN, 40, NULL);
   //上下左右键分别对应的十进制为38、40、37、39
}
HWND _FindWindow(LPCTSTR lpClassName,
                 LPCTSTR lpWindowName)
{
HWND hWnd=NULL;
   while(1)
{
    hWnd=::FindWindow(lpClassName,lpWindowName);
       if(hWnd)
     break;
}
   return hWnd;
}
HWND _FindWindowEx(HWND hwndParent,
                   HWND hwndChildAfter,
                   LPCTSTR lpszClass,
                   LPCTSTR lpszWindow)
{
HWND hBtn=NULL;
while(1)
{
   hBtn=::FindWindowEx(hwndParent,hwndChildAfter,lpszClass,lpszWindow);
   if(hBtn)
    break;
}
return hBtn;
}