| VCL Object and Component | .NET |
| TActiveForm | System.Windows.Forms.UserControl |
| TActiveFormControl | System.Windows.Forms.UserControl |
| TActiveFormFactory | |
| TActiveXControl | System.Windows.Forms.UserControl |
| TActiveXControlFactory | |
| TActiveXPropertyPage | System.Windows.Forms.PropertyGrid |
| TActiveXPropertyPageFactory | |
| TAdapterNotifier | |
| TConnectionPoints | |
| TCustomAdapter | |
| TFontAdapter | |
| TOleGraphic | |
| TOleStream | System.IO.Stream |
| TPictureAdapter | |
| TPropertyPage | System.Windows.Forms.PropertyGrid |
| TPropertyPageImpl | System.Windows.Forms.PropertyGrid |
| TReflectorWindow | |
| TStringsAdapter | |
| Routines |