IntelliCAD supports more AutoCAD application programming interfaces (APIs) than any other software, but not all of the AutoCAD APIs are available in IntelliCAD. The following table summarizes the AutoCAD APIs IntelliCAD supports.
| AutoCAD programming interface | IntelliCAD support |
|---|---|
| Scripts (SCR files) | Supported |
| AutoLISP (LSP files) | Supported |
| Dialog Control Language (DCL files) | Supported |
| AutoCAD Development System (ADS) | Supported; source code must be recompiled |
| Visual Basic Applications (VBA) | Supported, depending on your version of IntelliCAD |
| Direct Interactively Evaluated String Expression Language (Diesel) | Not supported |
| AutoCAD SQL Interface (ASI) | Not supported |
| Autodesk® Threaded Language Application System Toolkit (Atlast) | Not needed |
| AutoCAD Runtime Extension (ARx) | Not supported |