| VCL Object and Component | .NET |
| EHelpSystemException | System.Exception |
| ICustomHelpViewer | System.Object |
| IExtendedHelpViewer | System.Object |
| IHelpManager | System.Object |
| IHelpSelector | System.Object |
| IHelpSystem | System.Object |
| ISpecialWinHelpViewer | System.Object |
| Routines |