>More details please, I'm putting NavServices in the next release of 
>my program and don't understand how to test for them.
>
>I have been just using:
>
>gFBUseNavServices = _zTrue
>
>But I haven't tested my program on an older machine yet.  Will this 
>cause a problem?
>
>I tried:
>
>if ( fn NavServicesAvailable() ) then gFBUseNavServices = _zTrue
>
>which caused my program to crash.


Your program will crash if the library is not available. There is 
another example on the FB^3 release 3 CD that tells you if a library 
is available.



Best,

-STAZ  ~)~

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