A detailed reference guide for each SRP Signature Control event. Included in each reference is the event's parameters and a description of the event's meaning and usage:

EventDescriptionVersion IntroducedPro Version Introduced
OnBalloonClickFires when the user clicks on a balloon tooltip.  
OnContextMenuClickFired when a menu item on the custom context menu is clicked  
OnGotFocusFired when the control receives input focus.1.0.23.1.0
OnLostFocusFired when the control loses input focus.1.0.23.1.0
OnMouseEnterFired when mouse enters the control.1.0.23.1.0
OnMouseExitFired when the mouse leaves the control.1.0.23.1.0