UINT BCGM_ON_TOGGLE_RIBBON_MINIMIZE_STATE |
Sent to Ribbon's parent when a Ribbon minimize state has been changed.
wParam | TRUE - if Ribbon is minimized, FALSE - if not. |
lParam | This parameter is not used. |
The framework sends BCGM_ON_TOGGLE_RIBBON_MINIMIZE_STATE registered message to the Ribbon's parent when a Ribbon minimize state has been changed.