formroller OnRollerChanged event
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Applies to
acFormRoller component.  

Declaration
type  
  TacFormRollerChangedEvent = procedure(Sender: TObject; RollUp: Boolean) of object;  
 
property OnRollerChanged: TacFormRollerChangedEvent;  

Description
The OnRollerChanged event occurs when user click the button on the form's title bar or selects the menu item in the system menu, associated with the caption button.  

Parameters
RollUpdetermines current form / button state. True if form's height is reduced (rolled up) and False when form in normal state.  

See also
RollUp, RemainHeight properties.