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GetBaseClassPickRectangle Method
If the get was a GetObjects() and the mouse was used to select the objects, then the returned rect has left < right and top < bottom. This rect is the Windows GDI screen coordinates of the picking rectangle. RhinoViewport.GetPickXform( pick_rect, pick_xform ) will calculate the picking transformation that was used. In all other cases, left=right=top=bottom=0;

Namespace: Rhino.Input.Custom
Assembly: RhinoCommon (in RhinoCommon.dll) Version: 5.1.50000.0 (5.0.20693.0)
Syntax
public Rectangle PickRectangle()

Return Value

Type: Rectangle
The picking rectangle; or 0 in the specified cases.
See Also