AutoCAD Map 3D 2009 Geospatial Platform Reference From AutoCAD Map 3D Geospatial Platform API previous page next page Overview Modules Classes MgEnvelope Contains Contains ExpandToInclude ExpandToInclude GetDepth GetHeight GetLowerLeftCoordinate GetUpperRightCoordinate GetWidth Intersects IsNull MakeNull MgEnvelope MgEnvelope MgEnvelope MgEnvelope MgEnvelope Transform bool MgEnvelope::IsNull ( ) Tests whether this Envelope is "null" or not. .NET Syntax bool IsNull(); Java Syntax boolean IsNull(); PHP Syntax bool IsNull(); Returns:True if this envelope is "null", false otherwise. previous page start next page