www.pudn.com > GPSTest.rar > Utils.cs

// 
// Copyright (c) Microsoft Corporation.  All rights reserved. 
// 
// 
// Use of this source code is subject to the terms of the Microsoft end-user 
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT. 
// If you did not accept the terms of the EULA, you are not authorized to use 
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your 
// install media. 
// 
#region Using directives 
 
using System; 
 
#endregion 
 
namespace Microsoft.WindowsMobile.Samples.Location 
{ 
    /// 
 
    /// Summary description for Utils. 
    /// 
 
    public class Utils 
    { 
        public Utils() 
        { 
        } 
 
        public static IntPtr LocalAlloc(int byteCount) 
        { 
            IntPtr ptr = Win32.LocalAlloc(Win32.LMEM_ZEROINIT, byteCount); 
            if (ptr == IntPtr.Zero) 
            { 
                throw new OutOfMemoryException(); 
            } 
 
            return ptr; 
        } 
 
        public static void LocalFree(IntPtr hMem) 
        { 
            IntPtr ptr = Win32.LocalFree(hMem); 
            if (ptr != IntPtr.Zero) 
            { 
                throw new ArgumentException(); 
            } 
        } 
    } 
 
    public class Win32 
    { 
        public const int LMEM_ZEROINIT = 0x40; 
        [System.Runtime.InteropServices.DllImport("coredll.dll", EntryPoint = "#33", SetLastError = true)] 
        public static extern IntPtr LocalAlloc(int flags, int byteCount); 
 
        [System.Runtime.InteropServices.DllImport("coredll.dll", EntryPoint = "#36", SetLastError = true)] 
        public static extern IntPtr LocalFree(IntPtr hMem); 
    } 
}