New GEN interface is created in 9.2.SG: This code runs much faster than the given example which takes ages - should probably be added as an example snippet:Try Dim sb As New System.Text.StringBuilder sb.Length = 10000 ' Get the result as a string Dim pStr As String = sb.ToString Dim cBytesWrote As Long Dim pESRISpatialRef2 As IESRISpatialReferenceGEN = AxMapControl1.Map.SpatialReference pESRISpatialRef2.ExportToESRISpatialReference(pStr, cBytesWrote) MessageBox.Show(pStr)Catch ex As Exception MessageBox.Show(Err.Description)End Try