This games can't be widescreen, they using pre-rendered background images with fixed sizes (800x600 or 1024x768).
You can use dgVoodoo 2 wrapper to force resolution.
- Download - dgVoodoo2 wrapper
- Copy D3D8.dll file from dgVoodoo2_54\MS\ to the game folder
- Run dgVoodooSetup.exe
- At "General" tab, choice "Scaling mode" - "Stretched, 4:3 Aspect Ratio" or just "Stretched".
- At "DirectX" tab:
uncheck "dgVoodoo Watermark";
uncheck "Disable Alt-Enter to toggle screen state";
set "VRAM" - 1024 MB;
set "Filtering" - "Force anisotropic 16x"
set "Antialiasing (MSAA)" - "8x"
set "Resolution" - "Max FHD" - Run game
If you need windowed mode just press Alt+Enter.