C++ FindPattern

DWORD FindPattern(const BYTE* Pattern, const char* Mask, DWORD AddValue = NULL, bool SubtractBase = false)
{
    if (DumpedRegion == nullptr) if (!this->Dump()) return NULL;

    DWORD FoundOff = NULL;

    for (DWORD i=0; i<ModuleBase + ModuleSize; i++)
    {
        if (this->MaskCheck(i, Pattern, Mask))
        {
            if (!SubtractBase)
                return this->ModuleBase + (i + AddValue);
            else
                return (this->ModuleBase + (i + AddValue)) - ModuleBase;
        }
    }

    return NULL;
}