;we use external function ExitProcess
;from Kernel32.dll to quit our program
extrn ExitProcess : proc

.code
;Main procedure is Entry Point of our program
Main proc
    ;allocate shadow space as described
    ;in Microsoft x64 calling convention
    sub rsp, 28h

    ;our code goes here.


    xor rcx, rcx ;RCX contains exit code (zero)
    call ExitProcess ;calling WinAPI function
Main endp
end