GTA3 refused to run in a window through DxWnd when I ran it from CD image ISOs (even with the GTA 3.dxw settings file from 'gho' above ↑ ↑ ↑) but it would run full screen. I know I got this game running in a window years ago, so I knew it could be done. Eventually I got a cracked rip of the game and tried that and it worked; you need to 'Import' GTA 3.dxw settings in DxWnd and run DxWnd as Administrator. You can even use the gta3.exe v1.1 no cd version with the ripped game and it will work in a window....
GTA3 refused to run in a window through DxWnd when I ran it from CD image ISOs (even with the GTA 3.dxw settings file from 'gho' above ↑ ↑ ↑) but it would run full screen. I know I got this game running in a window years ago, so I knew it could be done. Eventually I got a cracked rip of the game and tried that and it worked; you need to 'Import' GTA 3.dxw settings in DxWnd and run DxWnd as Administrator. You can even use the gta3.exe v1.1 no cd version with the ripped game and it will work in a window....