Creating an addin for DraftSight using VB NET

Good afternoon to all,

I can not understand how to add an addin in the list of addins that I find in the item's Add-Ins on the Tools menu.

I am a new user of DraftSight.

I am a Premium version of DraftSight, i can use API.

Doing some tests I saw that the menu item File - Open allows you to open files with the extension dll, this is done by selecting the file type 'Add-ins'.

This is done by selecting the file type 'Add-ins'.

This is the way to record the addin that I'm implementing?

I tried to open my addin but it gives me an error.

I have attached pictures showing how I try to open the addin and the error is returned to me.