Int 2F Fn CA04  - Tbscanx - Scan File                                      [v]

   AX = CA04h
   DS:DX -> filename

Return: CF clear if no virus signatures found
       BX,SI,DI,ES destroyed
   CF set if signature found
       ES:BX -> ASCIZ virus name
   AX,CX,DX destroyed

Note:  this function requires at least 4K free memory

See Also: AX=CA03h