>In Fox DOS the CHR(251) worked, but in VFP I can't get it to work.

If you want to make it look quite nice, try the .picture property
myList.picture(x)= "ticked.bmp"
myList.picture(x)= "unticked.bmp"
where x is the list index
and you can capture/create use any .bmp file (also use a mask, .msk, file for best effect)
HTH