Get the handle of a window with not fully known title. (C#)

Question

The title is partially static with an variable suffix. For example \"Window Title {- user_id}\".

How can I get the handle without knowing the exact title?

Answer 1

This CodeProject article describes how to enumerate Top level windows (Based on Win32 API EnumWindows). You can easily modify it to filter on a partial window title: Modify EnumWindowsCallBack.

HTH.

Answer 2

Get by class name and parent window handle. For example: get start button handle using win32api. First you know parent window class name using spyxx tool.

[DllImport("user32.dll")]
public static extern IntPtr FindWindowEx(IntPtr handleParent, IntPtr handleChild, string className, string WindowName);
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string className, string windowTitle);

Usage:

IntPtr handle = FindWindowEx(FindWindow("Shell_TrayWnd",null), new IntPtr(0), "Button", null);

Answer 3

Look through all the Processes and check the MainWindowTitle. (You can use regexps, or StartsWith, etc)

foreach(Process proc in Process.GetProcesses())
{
   if(proc.MainWindowTitle.StartsWith("Some String"))
   {
      IntPtr handle = proc.MainWindowHandle;
      // ...
   }
}