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    case Msg.wParam of
      DBT_DEVICEQUERYREMOVE:
      begin
        if PDevBroadcastHdr(Msg.lParam)^.dbcd_devicetype = DBT_DevTyp_Volume then
        begin
          Drive := GetDrive(PDevBroadcastVolume(Msg.lParam));
          if Drive = strProgrammDriveLetter then
          begin
            bolClose := True;
            Application.Terminate;
          end;
        end;
      end;
    end;