_TmpMsgDefaultBtn
| Delphi | C#.NET | Supported |
| _TmpMsgDefaultBtn | System.Windows.Forms.MessageBoxDefaultButton | Yes |
| Properties | ||
| MB_DEFBUTTON1 | System.Windows.Forms.MessageBoxDefaultButton.Button1 | Yes |
| MB_DEFBUTTON2 | System.Windows.Forms.MessageBoxDefaultButton.Button2 | Yes |
| MB_DEFBUTTON3 | System.Windows.Forms.MessageBoxDefaultButton.Button3 | Yes |
| MB_DEFBUTTON4 | System.Windows.Forms.MessageBoxDefaultButton.Button3 | Yes |