The GMSManager property returns a Global Macro Storage (GMS) Manager, or GMSManager, object. A GMS manager lets you run VBA macros from other programs, as well as manage GMS modules.
Examples:
The following VBA example runs a macro, Cropmarks, in the Main module of GMS CropMarks.
Sub Test()
GMSManager.RunMacro "CropMarks", "Main.Cropmarks"
End Sub