C# get child handles using FindWindowEx by name and ordinal number

问题:

According to http://msdn.microsoft.com/en-us/library/ms633500(v=vs.85).aspx I define FindWindowEx function.

using System.Runtime.InteropServices;  [DllImport("user32.dll", CharSet=CharSet.Unicode)] static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string lclassName, string windowTitle);  

Now I am able to find first handle of "Button" control (get name from Spy++) setting childAfter as IntPtr.Zero.

IntPtr hWndParent = new IntPtr(2032496);  // providing parent window handle IntPtr hWndButton = FindWindowEx(hWndParent, IntPtr.Zero, "Button", string.Empty); 

How to get second, third or any handle of "Button" control inside that parent window? The fact is, button titles may vary, so I cannot find them directly by name defining fourth parameter.

回答1:

static IntPtr FindWindowByIndex(IntPtr hWndParent, int index) {     if (index == 0)         return hWndParent;     else     {         int ct = 0;         IntPtr result = IntPtr.Zero;         do         {             result = FindWindowEx(hWndParent, result, "Button", null);             if (result != IntPtr.Zero)                 ++ct;         }         while (ct 

Use like:

IntPtr hWndThirdButton = FindWindowByIndex(hWnd, 3); // handle of third "Button" as shown in Spy++ 

文章来源: C# get child handles using FindWindowEx by name and ordinal number