MainFile Property
Contains the name and path of the file set as the main program in a project. Read-only.
Object.MainFile
Remarks
Applies To: Project Object
MainFile contains the empty string if a main program has not been set for a project. A program or form can be set as the main program in a project by right-clicking the program or form and choosing Set Main from the shortcut menu. You can also use the SetMain method to programmatically specify a main program for a project.