64-bit Windows hello world assembler example, works with Command Prompt, PowerShell, and cygwin-like environments

hello.asm

; Build:
;
; nasm -f win64 hello.asm
; powershell -Command "~\\vsexec.bat link /entry:start /subsystem:console hello.obj kernel32.lib"
;
; The PowerShell wrapper ensures that the linker (either link.exe or golink) receives the correct flags,
; even when the linker command is executed from cygwin-like environments such as Git Bash.
;
; vsexec.bat:
; call "C:\\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Auxiliary\Build\vcvarsall.bat" amd64 %*
;
; Requires nasm, Visual Studio build tools, e.g.
; nasm, visualstudio2017buildtools, visualstudio2017-workload-vctools Chocolatey packages

extern GetStdHandle
extern WriteFile
extern ExitProcess

section .rodata

msg db "Hello World!", 0x0d, 0x0a

msg_len equ $-msg
stdout_query equ -11

section .data

stdout dw 0
bytes_written dw 0

section .text

global start

start:
    mov rcx, stdout_query
    call GetStdHandle
    mov [rel stdout], rax

    mov  rcx, [rel stdout]
    mov  rdx, msg
    mov  r8, msg_len
    mov  r9, bytes_written
    push qword 0
    call WriteFile

    xor rcx, rcx
    call ExitProcess

section .data
    hello db 'Hello, World!', 0  
    helloLen equ $ - hello        

section .text
    global main
    extern ExitProcess, WriteConsoleA, GetStdHandle

main:
    sub rsp, 28h               
    mov rcx, -11                
    call GetStdHandle

    ; Escribir el mensaje en la consola
    mov r9, 0                
    mov r8, helloLen          
    mov rdx, hello            
    mov rcx, rax               
    call WriteConsoleA        

    ; Terminar el programa
    mov rcx, 0                 
    call ExitProcess            

Note that Windows no longer maintains a stable below-C ABI. The vast majority of online Windows assembler tutorials no longer work.

Unknown about 32 bit support.

Advise targeting a modern programming language like Go or Rust.