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Microsoft® Visual Basic® Scripting Edition GetExtensionName Method  | 
 Language Reference  Version 3  | 
Returns a string containing the extension name for the last component in a path.
object.GetExtensionName(path)The GetExtensionName method syntax has these parts:
Part Description object Required. Always the name of a FileSystemObject. path Required. The path specification for the component whose extension name is to be returned. 
For network drives, the root directory (\) is considered to be a component.The GetExtensionName method returns a zero-length string ("") if no component matches the path argument.
The following example illustrates use of the GetExtensionName method:
Function GetAnExtension(DriveSpec) Dim fso Set fso = CreateObject("Scripting.FileSystemObject") GetAnExtension = fso.GetExtensionName(Drivespec) End Function