BCGCBPRODLLEXPORT UINT BCGM_ON_CLICK_WINUI_CAPTION_BUTTON |
The message is sent to the owner of WinUI Tiles (CBCGPWinUITiles) when the user clicks a caption button.
wParam | contains the control ID of the WinUI Tiles. |
lParam | a pointer to a clicked caption button (CBCGPWinUITilesCaptionButton). |