.386
.model flat, stdcall
option casemap :none
 
include windows.inc
include user32.inc
include kernel32.inc
include advapi32.inc
 
includelib user32.lib
includelib kernel32.lib
includelib advapi32.lib
 
.data 
 
SubKey		db	"Software\Microsoft\Windows Live\Messenger",0
Nombre	db	"Multiple Instances",0
 
Mensaje	db	"Carpeta No Encontrada",0
Titulo	db	"Error",0
 
.data?
hKey	dd ?
Buffer dd ?
 
.code
 
Main:
 
invoke RegOpenKeyEx,HKEY_LOCAL_MACHINE, addr SubKey,0,KEY_ALL_ACCESS,addr hKey
.if al==NULL
	invoke MessageBox,NULL,addr Mensaje,addr Titulo,MB_OK + MB_ICONINFORMATION
	.else
		invoke RegSetValueEx,addr hKey,addr Nombre,0,REG_DWORD,addr Buffer, 1
		invoke RegCloseKey,addr hKey
.endif
 
invoke ExitProcess,0
 
 
 
End Main