Name 

Description 

 

OnAlignInsertBefore 

Occurs when an object with custom alignment is aligned. 

 

OnAlignPosition 

Occurs when an object with custom alignment is aligned. 

 

OnCanResize 

Occurs when an attempt is made to resize the control. 

 

OnConstrainedResize 

Adjust resize constraints. 

 

OnContextPopup 

Occurs when the user right-clicks the control or otherwise invokes the popup menu (such as using the keyboard). 

 

OnDockDrop 

Occurs when another control is docked to the control. 

 

OnDockOver 

Occurs when another control is dragged over the control. 

 

OnEndDock 

Occurs when the dragging of an object ends, either by docking the object or by canceling the dragging. 

 

OnGetSiteInfo 

Returns the control's docking information. 

 

OnMouseActivate 

Occurs when the user presses a mouse button with the mouse pointer over a control and the parent form is not active. 

 

OnMouseEnter 

Occurs when the user moves the mouse into a control. 

 

OnMouseLeave 

Occurs when the user moves the mouse outside of a control. 

 

OnMouseWheel 

Occurs when the mouse wheel is rotated. 

 

OnMouseWheelDown 

Occurs when the mouse wheel is rotated downward. 

 

OnMouseWheelUp 

Occurs when the mouse wheel is rotated upward. 

 

OnResize 

Occurs immediately after the control is resized. 

 

OnStartDock 

Occurs when the user begins to drag a control with a DragKind of dkDock. 

 

OnUnDock 

Occurs when the application tries to undock a control that is docked to the windowed control.