ok, i have sucessed. the sample code: VARIANT v; long pos = 0; LPSAFEARRAY pSA = SafeArrayCreateVector(VT_VARIANT, 0, 1); _variant_t var(_bstr_t("deinterlace-mode=mode")); SafeArrayPutElement(pSA, &pos, (void FAR *)&var); v.parray = pSA; v.vt = VT_ARRAY; m_VLCControl.put_Visible(TR...