As Neil posted transform() can be used but it only works with numeric values. If you are trying to convert a string you'll have to do it one character at a time:

lcHex = ""
for i = 1 to len( lcStr )
   lcHex = lcHex + right( transform( asc( substr( lcStr, i, 1 ) ), "@0" ), 2 )
endfor

>What is the VFP syntax for converting ASCII to Hexidecimal. It is driving me nuts and it is not in the Help file and I knew how to do it once upon a time. Thanks for the feedback!!