GMap.NET.WindowsMobile/GMap.NET.Internals/Native.cs

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namespace GMap.NET.Internals
{
   using System;
   using System.Runtime.InteropServices;

   public class Native
   {
      static readonly IntPtr INVALID_HANDLE_VALUE = (IntPtr) (-1);

      // The CharSet must match the CharSet of the corresponding PInvoke signature
      [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
      struct WIN32_FIND_DATA
      {
         public int dwFileAttributes;
         public FILETIME ftCreationTime;
         public FILETIME ftLastAccessTime;
         public FILETIME ftLastWriteTime;
         public int nFileSizeHigh;
         public int nFileSizeLow;
         public int dwOID;
         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=260)]
         public string cFileName;
         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=14)]
         public string cAlternateFileName;
      }

      [StructLayout(LayoutKind.Sequential)]
      struct FILETIME
      {
         public int dwLowDateTime;
         public int dwHighDateTime;
      };

      [DllImport("note_prj", EntryPoint="FindFirstFlashCard")]
      extern static IntPtr FindFirstFlashCard(ref WIN32_FIND_DATA findData);

      [DllImport("note_prj", EntryPoint="FindNextFlashCard")]
      [return: MarshalAs(UnmanagedType.Bool)]
      extern static bool FindNextFlashCard(IntPtr hFlashCard, ref WIN32_FIND_DATA findData);

      [DllImport("coredll")]
      static extern bool FindClose(IntPtr hFindFile);

      public static string GetRemovableStorageDirectory()
      {
         string removableStorageDirectory = null;
         IntPtr handle = IntPtr.Zero;
         try
         {
            WIN32_FIND_DATA findData = new WIN32_FIND_DATA();

            handle = FindFirstFlashCard(ref findData);

            if(handle != INVALID_HANDLE_VALUE)
            {
               do
               {
                  if(!string.IsNullOrEmpty(findData.cFileName))
                  {
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