Winform获取当前拥有焦点的控件

The .Net framework libraries does not provide you an API to query for the focused Control. You have to invoke a windows API to do so:

[C#]

public class MyForm : Form

{

          [DllImport("user32.dll", CharSet=CharSet.Auto, CallingConvention=CallingConvention.Winapi)]

          internal static extern IntPtr GetFocus();

          private Control GetFocusedControl()

          {

               Control focusedControl = null;

               // To get hold of the focused control:

               IntPtr focusedHandle = GetFocus();

               if(focusedHandle != IntPtr.Zero)

                    // Note that if the focused Control is not a .Net control, then this will return null.

                    focusedControl = Control.FromHandle(focusedHandle);

               return focusedControl;

          }

}