Anchors the corresponding rectangle drawing to the visible bar index; returns a value of 0 if the operation was performed successfully, and a value of -2 if the specified rectangle ID number is invalid.
Where: :'''ID ''' - is a numerical expression specifying the rectangle ID number :'''LogicalExpression ''' - is a logical value; True = Add option and False = Remove option
== Notes ==
A rectangle-specific ID number is returned by RectangleNew when the rectangle is created.
== Example==
Anchor the rectangle with an ID number of 3 to the visible bar index: