problem mit detour

BYTE *detour(BYTE *origin,BYTE *det, int len){
	DWORD dwProt;
	BYTE *memory =  new BYTE[len +5];
 
	for(int i = 0;i<len;i++){
		memory[i] = origin[i];
	}
 
	memory[len] = 0xe9;
 
	DWORD p  = 5 + origin - memory;
	memcpy(memory + len + 1,&p ,4);
 
	p = origin - det;
 
	if(VirtualProtect( origin, 5, PAGE_READWRITE, &dwProt )){
		origin[0] = 0xe9;
		memcpy(origin + 1,&p,4);
		VirtualProtect( origin, 5, dwProt, &dwProt );
	}
 
	return memory;
}