• mrNone = 0
• mrOk = 1
• mrCancel = 2
• mrAbort = 3
• mrRetry = 4
• mrIgnore = 5
• mrYes = 6
• mrNo = 7
• mrAll = 8
• mrNoToAll = 9
• mrYesToAll = 10
• mrClose = 11

Ссылки: MessageDlg, TForm.ShowModal