以下の方法でどうでしょうか? Dim session As New NotesSession Dim ws As New NotesUIWorkspace Dim uidoc As NotesUIDocument Dim tmp As Variant Set uidoc = ws.CurrentDocument uidoc.EditMode = True Call uidoc.Refresh '添付ファイル有無チェック tmp = Evaluate("@Attachments") If Cint(tmp(0)) = 0 Then Messagebox "ファイルを添付してください",16,"エラー" End If