BCGCBPRODLLEXPORT 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.
wParam | contains the control ID of the WinUI Tiles. |
lParam | a pointer to a clicked group caption (CBCGPWinUITilesGroupCaption). |