Need help with preprocessor definitions in the Import Shared Library Wizard

I'd like some help with the preprocessor definitions window.

The Wizard says none of the functions in the library file were found in the header file and also says that the following three 'symbols' are undefined for the aceSetMetrics function: S16BIT, U16BIT, and _DECL

I backed up in the Wizard and tried the following in the preprocessor window for S16BIT and U16BIT, not having a clue what to try for _DECL:

S16BIT = int16; U16BIT = uInt16

After another attempt, all three 'symbols' are still undefined.

The header file is attached (I deleted all functions but the one I chose for troubleshooting).

Thanks,

Jeff