How to write hello world in assembler under Windows?

Question

I wanted to write something basic in assembly under Windows, I\'m using NASM, but I can\'t get anything working.

How to write and compile hello world without the he

Answer 1

Flat Assembler does not need an extra linker. This makes assembler programming quite easy. It is also available for Linux.

This is hello.asm from the Fasm examples:

include 'win32ax.inc'

.code

  start:
    invoke  MessageBox,HWND_DESKTOP,"Hi! I'm the example program!",invoke GetCommandLine,MB_OK
    invoke  ExitProcess,0

.end start

Fasm creates an executable:

>fasm hello.asm
flat assembler  version 1.70.03  (1048575 kilobytes memory)
4 passes, 1536 bytes.

And this is the program in IDA:

You can see the three calls: GetCommandLine, MessageBox and ExitProcess.