You can use GetCapture in conjunction with SetCapture to obtain the window handle of a Control. See the sample code below.

   SetCapture(hOldWnd);

static extern IntPtr SetCapture(IntPtr hWnd);

Declare Function SetCapture Lib "coredll.dll" (ByVal hWnd As IntPtr) As IntPtr

You can use SetCapture in conjunction with GetCapture to obtain the window handle of a Control. See the sample code below.

   SetCapture(hOldWnd);

Use this in conjunction with the SetCapture/GetCapture HWND sample:

static extern IntPtr SetCapture(IntPtr hWnd);