You can call a procedure located in any module in the same project as the active module just as you would call a procedure in the active module. However, if two or more modules contain a procedure with the same name, you must specify a module name in the calling statement, as shown in the following example:

Sub Main() Module1.MyProcedure End Sub 

If you give the same name to two different procedures in two different projects, you must specify a project name when you call that procedure. For example, the following procedure calls the

Main
procedure in the
MyModule
module in the
MyProject.vbp
project.
Sub Main() [MyProject.vbp].[MyModule].Main End Sub 
Note
Different applications have different names for a project. For example, in Microsoft Access, a project is called a database (.mdb); in Microsoft Excel, it's called a workbook (.xls)

Tips for Calling Procedures