webcam

public void DisplayVideoCaptureDevicePropertyPage(IntPtr handle)
        {
            IBaseFilter device = CreateFilter(DirectShowLib.FilterCategory.VideoInputDevice, "myDeviceName");
            DisplayPropertyPage(device, handle);
        }

        #endregion

        #region private methods

        private IBaseFilter CreateFilter(Guid category, string friendlyname)
        {
            object source = null;
            Guid iid = typeof(IBaseFilter).GUID;
            foreach (DsDevice device in DsDevice.GetDevicesOfCat(category))
            {
                if (device.Name.CompareTo(friendlyname) == 0)
                {
                    device.Mon.BindToObject(null, null, ref iid, out source);
                    break;
                }
            }

            return (IBaseFilter)source;
        }

        private void DisplayPropertyPage(IBaseFilter dev, IntPtr handle)
        {
            //Get the ISpecifyPropertyPages for the filter
            ISpecifyPropertyPages pProp = dev as ISpecifyPropertyPages;
            int hr = 0;

            if (pProp == null)
            {
                //If the filter doesn't implement ISpecifyPropertyPages, try displaying IAMVfwCompressDialogs instead!
                IAMVfwCompressDialogs compressDialog = dev as IAMVfwCompressDialogs;
                if (compressDialog != null)
                {

                    hr = compressDialog.ShowDialog(VfwCompressDialogs.Config, IntPtr.Zero);
                    DsError.ThrowExceptionForHR(hr);
                }
                return;
            }

            //Get the name of the filter from the FilterInfo struct
            DirectShowLib.FilterInfo filterInfo;
            hr = dev.QueryFilterInfo(out filterInfo);
            DsError.ThrowExceptionForHR(hr);

            // Get the propertypages from the property bag
            DsCAUUID caGUID;
            hr = pProp.GetPages(out caGUID);
            DsError.ThrowExceptionForHR(hr);

            // Check for property pages on the output pin
            IPin pPin = DsFindPin.ByDirection(dev, PinDirection.Output, 0);
            ISpecifyPropertyPages pProp2 = pPin as ISpecifyPropertyPages;
            if (pProp2 != null)
            {
                DsCAUUID caGUID2;
                hr = pProp2.GetPages(out caGUID2);
                DsError.ThrowExceptionForHR(hr);

                if (caGUID2.cElems > 0)
                {
                    int soGuid = Marshal.SizeOf(typeof(Guid));

                    // Create a new buffer to hold all the GUIDs
                    IntPtr p1 = Marshal.AllocCoTaskMem((caGUID.cElems + caGUID2.cElems) * soGuid);

                    // Copy over the pages from the Filter
                    for (int x = 0; x < caGUID.cElems * soGuid; x++)
                    {
                        Marshal.WriteByte(p1, x, Marshal.ReadByte(caGUID.pElems, x));
                    }

                    // Add the pages from the pin
                    for (int x = 0; x < caGUID2.cElems * soGuid; x++)
                    {
                        Marshal.WriteByte(p1, x + (caGUID.cElems * soGuid), Marshal.ReadByte(caGUID2.pElems, x));
                    }

                    // Release the old memory
                    Marshal.FreeCoTaskMem(caGUID.pElems);
                    Marshal.FreeCoTaskMem(caGUID2.pElems);

                    // Reset caGUID to include both
                    caGUID.pElems = p1;
                    caGUID.cElems += caGUID2.cElems;
                }
            }

            // Create and display the OlePropertyFrame
            object oDevice = (object)dev;
            hr = OleCreatePropertyFrame(handle, 0, 0, filterInfo.achName, 1, ref oDevice, caGUID.cElems, caGUID.pElems, 0, 0, IntPtr.Zero);
            DsError.ThrowExceptionForHR(hr);

            // Release COM objects
            Marshal.FreeCoTaskMem(caGUID.pElems);
            Marshal.ReleaseComObject(pProp);
            if (filterInfo.pGraph != null)
            {
                Marshal.ReleaseComObject(filterInfo.pGraph);
            }
        }

        [DllImport(@"oleaut32.dll")]
        public static extern int OleCreatePropertyFrame(
            IntPtr hwndOwner,
            int x,
            int y,
            [MarshalAs(UnmanagedType.LPWStr)] string lpszCaption,
            int cObjects,
            [MarshalAs(UnmanagedType.Interface, ArraySubType = UnmanagedType.IUnknown)]
            ref object ppUnk,
            int cPages,
            IntPtr lpPageClsID,
            int lcid,
            int dwReserved,
            IntPtr lpvReserved);