حذف فایل با دستورات اسمبلی

 ;----------------------------------------------
 ;Deleting file        
 ; ---------------------------------------------
 ermac macro ;//print error message if can't delete file
  lea dx,errormsg
  mov ah,09h
  int 21h 
 endm
;////////////////////////////////// 
okmac macro  ;//print the file deleted succsesfuly if it can delete file
  lea dx,okmsg
  mov ah,09h
  int 21h
  endm
;//////////////////////////////////  
 datasg  segment 'code'
 fil  db 'c:\programmer.blogsky.com.txt',00h
 okmsg   db 'the file deleted succsesfuly',"$"
 errormsg db 'error in deleting file',"$"
 datasg  ends
 ;--------------------------------
 codesg  segment 'code'
 main proc far
  assume ds:datasg,cs:codesg
  mov ax,datasg
  mov ds,ax
 
  lea dx,fil ;/file name that maust be deleted
  mov ah,41h ;/function for deleting file
  int 21h ;/interupt for deleting directory
 
  jnc l1 ;/go to l1 if deleting file is succsessfull
 
 ermac  ;/call error macro and print error message if can't delete file
  jmp l2      ;/goto end program
 
 l1:    okmac           ;/call okmac if it can delete file and print successfull
 
 l2:    mov ax,4c00h;/end of program
  int 21h
 main endp
 codesg ends
  end main