How to Start Coding Assembly on Windows (MASM) @crclayton

Uploaded September 2015 | Updated September 2026, 3 hours ago

Step 1.

Download MASM32: masm32.com/download.htm

Step 2.

Save the following Assembly code as "helloworld.asm"

.386
.model flat, stdcall
option casemap :none

include \masm32\include\kernel32.inc
include \masm32\include\masm32.inc
includelib \masm32\lib\kernel32.lib
includelib \masm32\lib\masm32.lib

.data
message db "This is your first assembly program", 0

.code
main:
invoke StdOut, addr message
invoke ExitProcess, 0
end main

Step 3:

Navigate to the folder you saved the file in. Then compile it into an executable and run it with the following:

set projectName=helloworld
\masm32\bin\ml /c /Zd /coff %projectName%.asm
\masm32\bin\Link /SUBSYSTEM:CONSOLE %projectName%.obj
%projectName%.exe

See more here: crclayton.com/projects/assembly-tutorial

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