Grasshopper API
GH_CanvasValidatorAddedToCanvas Method | 
 Override this method if you want to be informed when this validator gets assigned to a canvas. 
 But *always* call the base class method.
 
Namespace: Grasshopper.GUI.Canvas
Assembly: Grasshopper (in Grasshopper.dll)
public virtual void AddedToCanvas( GH_Canvas canvas )
Public Overridable Sub AddedToCanvas ( canvas As GH_Canvas )
Parameters
- canvas
 - Type: Grasshopper.GUI.CanvasGH_Canvas