Hi Amy,

I used to love seeing what I could do with the lowlevel functions so I took a moment to investigate your problem. I think the only thing wrong with what you did was you didn't include an option after the filename in the fopen to indicate that the file could be written to.

Thus:

STRTOFILE( REPLICATE("~",4096), 'myjunk.txt')
xHand = FOPEN('myjunk.txt',12)        && notice the comma-12!
pnPos1 = FSEEK(xHand ,10,1)
pAddDelimiter = FWRITE(xHand ,'%')
pnPos2 = FSEEK(xHand ,501,1)
pAddDelimiter = FWRITE(xHand ,'%')
pnPos3 = FSEEK(xHand ,742,1)
pAddDelimiter = FWRITE(xHand ,'%')

pClose = FCLOSE(xHand )
DISPLAY MEMORY TO PRINTER NOCONSOLE 

Does that help any?