Baseline (Widescreen) Solution & Issues
The HUD was designed for 4:3, so it's stretched in widescreen.
While you can set any resolution your system supports, the aspect ratio doesn't change.
Since it's older game the .ini file is located in game's folder located in Program Files. But on newer systems like Windows 8, the actual location is at
c:\Users\username\AppData\Local\VirtualStore\Program Files (x86)\Deep Silver\Dawn Of Magic\
Look for tbm.ini file
And change
setf ~r_aspect 1.333333 to your desired aspect ratio. 1.777778 for 1920x1080; 1.6 for 1920x1200, and so on.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
The HUD is stretched, but it's playable.
Eyefinity / Surround Specific Solution & Issues
4k UHD Specific Solution & Issues
It works. The HUD is stretched just as it is on 1920x1080, but i noticed the minimap is actually tiny