public Envelope QueryExtent( bool includeSymbolSize )
Public Function QueryExtent( _ Optional ByVal includeSymbolSize As Boolean _ ) As Envelope
Parameters
- includeSymbolSize
- (Optional) -true- computes extent of the layer using largest symbol size. 
 -false- returns the underlying FeatureClass' full extent.
 (default value = false)
Return Value
An envelope that covers all features of the layer.