void MgSelectionBase::Add	(	CREFSTRING	layer,
		CREFSTRING	className,
		CREFSTRING	id
	)

Adds the given feature (represented by its base64 encoded id) to the selection set.

Parameters:

layer	(CREFSTRING) Name of layer
className	(CREFSTRING) Name of feature class
id	(CREFSTRING) Base 64 string encoded ID of the feature