Andrew,

I think it should be HexEncoder() instead of StrToHex. Try

HexEncoder(FILETOSTR('c:\image_map.gif'))

>Thanks for the pointer. I have downloaded the FOXCRYPTO.DLL and am trying to use the example in the FAQ that you sent me to, as follows:

>set library to foxcrypto.fll
>? SQLEXEC(nSql, "UPDATE mainmap SET mapimage = " + ;
>  StrToHex(FILETOSTR('c:\image_map.gif')) + " WHERE mapid=1")

>I get the message that StrToHex is an unknown program. I've looked into the documentation of foxcrypto and don't see any reference to this function. I suspect I'm missing something very basic. Can you help me see it?
>