BCGControlBar Pro for MFC
UINT BCGM_ON_CLICK_WINUI_GROUP_CAPTION

The message is sent to the owner of WinUI Tiles (CBCGPWinUITiles) when the user clicks a group caption.

Parameters
wParamcontains the control ID of the WinUI Tiles.
lParama pointer to a clicked group caption (CBCGPWinUITilesGroupCaption).
Returns
The return value is ignored.