Bentley SS3

Our product use ucrdapi.h and ucrdapi.fdf in Microstation and Bentley MAP SS1.

And we would like to update them to SS3. but there are some problems.
Could anyone advise me how to change these code?

Actually,
#include <ucrdapi.h>

BEGIN_EXTERN_C
#include <ucrdapi.fdf>

We heard these files are disappeared in SS3.
So we have to change this code, could you let us know the file instead of them?
Are there in Geographic Coordinate Systems?

Best regards,

Anonymous
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