GetUserObjectInformation 的定义

        [DllImport("user32.dll", SetLastError = true)]
        public static extern bool GetUserObjectInformation(IntPtr hObj, int nIndex,
            [MarshalAs(UnmanagedType.LPStr)] StringBuilder pvBuffer, int nLength, ref int lpnLengthNeeded);

 

主要定义[MarshalAs(UnmanagedType.LPStr)] StringBuilder pvBuffer，供C#调用 LPStr与ASCII码对应转换