Application Property [Excel 2003 VBA Language Reference]
When used without an object qualifier, this property returns an Application object that represents the Microsoft Excel application. When used with an object qualifier, this property returns an Application object that represents the creator of the specified object (you can use this property with an OLE Automation object to return the application of that object). Read-only.
expression Required. An expression that returns one of the above objects.
This example displays a message about the application that created
Set myObject = ActiveWorkbook If myObject.Application.Value = "Microsoft Excel" Then MsgBox "This is an Excel Application object." Else MsgBox "This is not an Excel Application object." End If