How to extend the functionality of an AutoCAD command

[mecoman6GF27]

Hi everyone.

As per the title of the post, I would like to ask you if it is possible to expand the functionality of a command already present in AutoCAD.

I give an example. Let's imagine we have two solids. The first solid (red solid) has a hole which is occupied by a second solid (yellow solid).

What I would like to do is this: when I select the second solid and press the "Del" key on the keyboard I would like the solid to be canceled and the hole on the first solid to disappear.

It's possible?

I report two images that refer to the example I made earlier.

Thanks a lot, bye.

[Ed__Jobe]

Your question really involves two separate things.

1. Generally, you can't modify a command, but you can create macros that prefix or suffix functionality. To really extend a command, you need to duplicate what the original command does using an api and then add your own functionality.

2. Solid modeling doesn't work that way. You may be able to 'heal' a solid IF you have the history turned on. Then you can select subobjects and move, copy, rotate and erase them.