Download: https://sourceforge.net/projects/dxwnd/
--- RUN THE PROGRAM AS ADMIN

Add Bio2 to your tasks inside DXWND, right click it and choose "modify"

Under "Main" set

+ Hook Enabled
+ Run in Window
+ Hook All DLL's

set x and y coordinates to 0,0 , set the window size to whatever you'd like it to be

Under "Video" set

+ Lock Win Coordinates
+ Force Win Resize

Upon starting the game press F8 for the fullscreen mode (it will remember it even the next time you start it)

Voila, Bio 2 in whatever resolution you want it to be, even stretchable to 720 or 1080p!