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     |  | MessageBoxTimeoutっていうHiddenAPI(非公開API) を使って見るとか。
 
 (Sample)
 
 Private Declare Function MessageBoxTimeoutA Lib "User32" _
 (ByVal Hwnd As Long, _
 ByVal lpText As String, _
 ByVal lpCaption As String, _
 ByVal uType As VbMsgBoxStyle, _
 ByVal wLanguageID As Long, _
 ByVal dwMilliseconds As Long) As Long
 
 Private Const MB_TIMEOUT = &H7D00
 
 Sub TimerMsgbox()
 
 Dim Sec As Long
 Dim Result As Long
 Dim sMsg As String
 
 Sec = 4 * 1000 '4秒
 sMsg = "4秒後に消えます。"
 
 Result = MessageBoxTimeoutA(Application.Hwnd, sMsg, _
 Application.Name, vbOKCancel + vbMsgBoxSetForeground, 0&, Sec)
 
 Select Case Result
 Case vbOK
 sMsg = "OKボタンが押された。"
 Case vbCancel
 sMsg = "キャンセルボタンが押された。"
 Case MB_TIMEOUT
 sMsg = "4秒経ちました。"
 End Select
 
 MsgBox sMsg
 
 End Sub
 
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