Search for: KB10626 - Add or retreive custom information to a *.ttkgp project file. Simply use: Layer.ConfigFile.WriteString( 'MyCustomProperty', 'some_value'); To add a whole new section to the project file, use: GIS.ProjectFile.Section := 'MyPrivateSection' ; GIS.ProjectFile.WriteString( 'MyCustomProperty', 'some_value'); Created: April 18, 2005, Modified: September 10, 2015