poIVectorCtrl SetLayer
Sets the current shell layer.
Syntax
poIVectorCtrl_handle SetEnableState layer
Application
HyperView Tcl Modify
Description
This command sets the current shell layer. 
    Note: The storage within HyperView can accept a shell layer or a derived quantity of all shell
          layers (max, min, or extreme).
Inputs
- layer
 - The shell layer.
 
Errors
Returns 0 if successful, otherwise an error code.