From Xojo Documentation
The Plugins SDK (software development kit) is for using C/C++ to make your own plugin functions and controls for use with Xojo.
Plugins can be created for use by desktop, web and console projects.
|iOS Projects cannot use plugins.|
You find the full Plugin SDK documentation located in you Xojo installation here: Extras/PluginsSDK
The folder contains code and documentation in the following folders:
- Documentation: Contains the SDK documentation in HTML format.
- Examples: Example projects illustrating how to make Xojo plug-ins.
- Glue Code: C++ code you must add to your plug-in projects.
- Includes: Included by the glue code (and most likely by your own plug-in code as well).
There is also a Plugins channel in the forum to discuss the creation of Xojo plugins: Xojo Forum Plugins SDK Channel