utilities.cs

来自「功能：基于windows mobile 的地图查看器。使用vs2005开发」· CS 代码 · 共 40 行

using System;
using System.Runtime.InteropServices;

namespace PInvokeLibrary
{
	/// <summary>
	/// Summary description for Utilities.
	/// </summary>
	public class Utilities
	{
		/// <summary>
		/// Convert a string to an allocated character array.
		/// </summary>
		/// <param name="s">string to be converted</param>
		/// <returns>Location of allocated character array</returns>
		public static IntPtr StringToHLocalUni(string s)
		{
			if (s == null) 
			{
				return IntPtr.Zero;
			} 
			else 
			{
				int nc = s.Length;
				uint len = (uint)(2 * (1 + nc));
				IntPtr hLocal = Memory.LocalAlloc(Memory.LMEM_FIXED,len);
				if (hLocal == IntPtr.Zero) 
				{
					throw new OutOfMemoryException();
				} 
				else 
				{
					Marshal.Copy(s.ToCharArray(), 0, hLocal, s.Length);
					return hLocal;
				}
			}
		}
	}
}