int pascal EnableWindow(HWND hWnd, BOOL bEnable)
 <MS-WINDOWS equivalent>

  This function enables or disables a window. A window which is
disabled cannot receive any input. If a window is disabled, then all
of its children are also disabled.

Parameters
  hWnd is the handle of the window to enable or disable.
  bEnable is TRUE if the window is to be enabled, FALSE if we are
   disabling the window.
Returns
  Returns TRUE if the window handle was valid, FALSE if not.