Option Explicit
Sub TestModExists()
Debug.Print ModExists("ArcID")
Debug.Print ModExists("xxx")
End Sub
Function ModExists(name As String) As Boolean
ModExists = False
Dim pVBE As VBIDE.VBE
Set pVBE = Application.VBE
Dim l As Long
For l = 1 To pVBE.VBProjects.Count
Dim k As Long
For k = 1 To pVBE.VBProjects(l).VBComponents.Count
If pVBE.VBProjects(l).VBComponents(k).Type = vbext_ct_StdModule Then
Dim s As String
s = UCase(pVBE.VBProjects.Item(l).VBComponents(k).name)
If s = UCase(name) Then
ModExists = True
Exit Function
End If
End If
Next k
Next l
End Function