[Whislly ]老大！快点来吧！

[xudaneng]

[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
    public struct VideoCompressorInfo
    {
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
        public string szName;
        public Int32 dwHandle;
    }

        [DllImport("DSStream.dll")]
        public extern static int DSStream_EnumVideoCompressor(IntPtr pInfo, ref int piVidCompNum); 
 private void SetVideoParams_Load(object sender, EventArgs e)
        {
            int num = 0;
            XNStream.DSStream_EnumVideoCompressor(IntPtr.Zero, ref num);

            int size = Marshal.SizeOf(typeof(XNStream.VideoCompressorInfo));

            IntPtr structPtr = Marshal.AllocHGlobal(size * num);

            XNStream.DSStream_EnumVideoCompressor(structPtr, ref num);

            XNStream.VideoCompressorInfo[] infos = new XNStream.VideoCompressorInfo[num];

            for (int i = 0; i < num; ++i)
            {
                infos[i] = (XNStream.VideoCompressorInfo)Marshal.PtrToStructure((IntPtr)((int)structPtr + i * size), typeof(XNStream.VideoCompressorInfo));               
                this.EncodeComBox.Items.Add(infos[i].szName);
                //EncodeComBox为一个COMBox控件,第一项显示正确，之后的就是乱码
            }
            Marshal.FreeHGlobal(structPtr);