UINT BCGM_ON_CLOSEPOPUPWINDOW

This message is sent to an owner of CBCGPPopupWindow when user presses close button on the window caption.

Parameters

wParam	This parameter is not used.
lParam	Points to a window whose close button is pressed (CBCGPPopupWindow).

Returns

The return value is ignored.

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