format PE GUI on 'myfrmprg.exe'
entry start

  start:

        push    0
        push    0
        push    _message
        push    0
        call    [MessageBoxA]

        push    0
        call    [ExitProcess]

  _message db 'This program must be run in DOS mode.',0

  align 4

  data import

    dd 0,0,0,RVA kernel_name,RVA kernel_table
    dd 0,0,0,RVA user_name,RVA user_table
    dd 0,0,0,0,0

    kernel_table:
      ExitProcess dd RVA _ExitProcess
      dd 0
    user_table:
      MessageBoxA dd RVA _MessageBoxA
      dd 0

    kernel_name db 'KERNEL32.DLL',0
    user_name db 'USER32.DLL',0

    _ExitProcess dw 0
      db 'ExitProcess',0
    _MessageBoxA dw 0
      db 'MessageBoxA',0

  end data

  data fixups
  end data    

_message db "This program doesn't understand your fancy newfangled graphical OS. Only the one true OS will live forever, DOS!",0