May I Also Suggest

If you are showing the Other Form Modally

Then Dont Unload it , Just Hide it by setting me.visible = false or me.hide

Then unload it in the Form from where you opened it.

I mean

in Form1

Code:
Private Sub Command1_Click()
 Form2.Show vbModal
 Unload Form2

End Sub
In Form2

Code:
Private Sub Combo1_Click()

If Combo1.Text = "Close" Then
  Do Required Work
  Me.Hide
  Exit sub
End If

End Sub