This game always forces application to override high dpi scaling behavior.
When I play on 1080p 15inch display, everything is very small, the game graphics doesn't fill the whole screen.
Is there a way to set the in-game resolution to something like 1024x768, then somehow scale it to full screen.
This is how DosBox play those ancient games, otherwise the game would just display as a tiny little box on a typical modern display.

An update on this issue after some research and a chat with tech support.
I needed to enable GPU scaling in Nvidia Control Panel.
My problem is my cheap gaming laptop's display doesn't have display or GPU scaling.
Solution is to attach an external display via HDMI or play the game on low resolution monitor.

Found a new solution. Use dgVoodoo2, in DirectX configuration, set forced resolution to whatever fills the screen while maintaining aspect ratio.