How to code unliammo...

i have unliammo address (NOMENU HACK) in warrock ph...
my code for that:
================================================== ================
void WriteAsm ( void * pxAddress , BYTE * code , int size )
{
if(GetAsyncKeyState(VK_DELETE))
{
int t=0;
unsigned long Protection ;
VirtualProtect (( void *)unliammo , sizeof(t), PAGE_READWRITE , & Protection );
memcpy (( void *)unliammo, ( const void *) code , size );
VirtualProtect (( void *)unliammo, sizeof(t) , Protection , 0 );
}
}
================================================== ===========================

when i join in a room its work, but when the game is end... my game crashes and needed to restart again and again...

Need a source code for that.... those who knows it..... thanks in advance!!!

(or maybe a source that can return the value of unliammo when the game is end..)