BCGControlBar Pro for MFC
BOOL CBCGPGestureManager::BeginPanningFeedback ( HWND  hwnd)

Begins panning feedback.

Parameters
hwndA handle to the window that will have boundary feedback on it.
Returns
TRUE if it succeeds, FALSE if it fails.

Usually you don't have to call this method directly - it's used internally by CBCGPGestureBase::ProcessGestureEvent method