https://gitlab.synchro.net/main/sbbs/-/issues/1051#note_8137
There are a few different variants of DoorMud. If there's no ODoors62.dll with yours, and it runs without popping up in a Windows GUI, then you might be running either the 16bit/DOS version, or perhaps the XTRN version for Synchronet.
I'm running the DOOR32.SYS version of DoorMud, which does have a ODoors62.dll file included, and also runs inside a Windows GUI.
--- SBBSecho 3.34-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)