memset(voidptr_AddressOfDetouredFunction, JMP_OPCODE, OPCODE_LENGTH) ;

Relocation = static_cast<DATATYPE_ADDRESS> ( reinterpret_cast<unsigned long> (voidptr_AddressOfDetourFunction)
        - (reinterpret_cast<unsigned long> (voidptr_AddressOfDetouredFunction)
        + MIN_REQUIRED_FOR_DETOUR)) ;

memcpy( reinterpret_cast<void*> (reinterpret_cast<unsigned long> (voidptr_AddressOfDetouredFunction)
        + OPCODE_LENGTH), &Relocation, ADDRESS_LENGTH) ;