icon
| PB | C#.NET | Supported |
| icon | System.Windows.Forms.MessageBoxIcon | Yes |
| Properties | ||
| exclamation | System.Windows.Forms.MessageBoxIcon.Exclamation | Yes |
| information | System.Windows.Forms.MessageBoxIcon.Information | Yes |
| none | System.Windows.Forms.MessageBoxIcon.None | Yes |
| question | System.Windows.Forms.MessageBoxIcon.Question | Yes |
| stopsign | System.Windows.Forms.MessageBoxIcon.Stop | Yes |