Don't know whether this is any help but here is some code i came across that seaches string in cvs, you might be able to adapt it.

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cFile = Filetostr("C:\myfile.CSV") && Read file
For i = 0 To 32 && Loop through control characters
IF INLIST(i,10,13) && Skip Line Feed and Carriage Return
LOOP
ENDIF
cFile = Strtran(cFile,Chr(34),"") && Replace " ntrol Characters with Empty
cFile = Strtran(cFile,Chr(61),"") && Replace = ntrol Characters with Empty
cFile = Strtran(cFile,Chr(150),"") && Replace - ntrol Characters with Empty

cFile = STRTRAN(cFile,CHR(i),"") && reokace variabe i (Integer character) with empty
Endfor
= Strtofile(cFile,"C:\myfileCLEAN.CSV") && Convert back to file
*************************************************************************************************

APPEND CLEAN FILE INTO DATABASE
Use newdatabase
Zap
Append From c:\myfileclean.Csv Type Delimited
Locate &&go top
Delete &&delete headings
pack