确定另一个进程中的UI线程

Question

是否有可能在c#中确定由我的进程打开的另一个应用程序中的哪个线程是UI线程?

Answer 1

@HansPassant已经在MSDN论坛上回答了:

using System.Diagnostics;
...
public static ProcessThread GetUIThread(Process proc) {
  if (proc.MainWindowHandle == null) return null;
  int id = GetWindowThreadProcessId(proc.MainWindowHandle, IntPtr.Zero);
  foreach (ProcessThread pt in proc.Threads)
    if (pt.Id == id) return pt;
  return null;
}
[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern int GetWindowThreadProcessId(IntPtr hWnd, IntPtr procid);