Function 4Fh Find Next Matching File (FIND NEXT)
Find next ASCIIZ file
entry AH 4Fh
return CF clear data block written at current DTA
set AX error code (2, 12h)
note 1) If file found, DTA is formatted as in call 4Eh
2) Volume label searches using 4Eh/4Fh reportedly aren't 100% reliable
under DOS 2.x. The calls sometime report there's a volume label and
point to a garbage DTA, and if the volume label is the only item they
often won't find it
3) This function does not support network operations
4) Use of this call assumes that the original filespec contained wildcards