Changes the hash for the purpose of verifying layer's modifications.
// C# public long ChangeHash();
' VisualBasic Public Function ChangeHash() As Long
// Oxygene public function ChangeHash : Int64;
| long |
|True if item already exists on the list.|
Used to verify that the order of layers, params, etc., have been modified. Used mainly by TGIS_ControlLegend.