The hWnd property returns the handle to the control window.
The Windows operating system identifies each form or control in an
application by assigning it a numeric value called a handle, or hWnd.
This handle is required by many Windows API functions which can be
used to control the behavior and appearance of a window. For more
information, refer to the Windows User Interface documentation or the
Windows API technical reference which is part of the Microsoft
Windows SDK.
Note that because the hWnd property value can change while
the program is running, you should never store the value in a
variable.