UINT BCGM_ON_PRESS_CLOSE_BUTTON

This message is sent to a parent of CBCGPDockingControlBar when user presses close button on control bar's caption.

Parameters

wParam	This parameter is not used.
lParam	Points to a docking control bar whose close button is pressed.

Returns

should return TRUE if a control bar can't be closed; otherwise 0.

Process this message to be notified about pressing of close button.