Any CAD software often makes its own April fools jokes but if you insist on adding your own jokes to AutoCAD's own AI, here are some tips that will please your colleagues for sure. You can e.g. let AutoCAD display a seriously looking "system" message on any opened drawing: For this, you just need to create a text file ACADDOC.LSP in the AutoCAD folder with the following content: (alert (strcatGo to the original post...