BCGControlBar Pro for MFC
virtual BOOL CBCGPToolbarMenuButton::OpenPopupMenu ( CWnd *  pWnd = NULL)

Called by the framework when the user selects the toolbar menu button and it is required to open a popup menu.

Nonzero when a popup menu was created and opened successfully; otherwise 0.

This function is called by the framework when it is required to open a popup menu from the currently selected toolbar menu button.

pWndSpecifies the window that will receive the popup menu commands. It can be NULL only if the toolbar menu button has a parent window.