Its good to know that your program works fine with new libs and latest sentinel system drivers 7.6.0.
Please note that the mentioned content of spromeps.h are key type constants.
In order to use parallel port keys, you would require to choose 'custom' as Setup type while installing the Sentinel System drivers 7.6.0.
Then click the icon in the list for parallel drivers and install it. Refer to the attached screenshot.
Hope it helps !