BCGControlBar Pro for MFC
UINT BCGM_CUSTOMIZEHELP

The BCGM_CUSTOMIZEHELP is sent to the main frame window from customization property sheet (CBCGPToolbarCustomize) when the user presses the "Help" button or the F1 key.

Parameters
wParamspecifies the active page of the customization property sheet.
lParampoints to a CBCGPToolbarCustomize object.
Returns
should return zero.