/Visual Studio 2008/CSPInvokeDll/NativeMethod.cs

/****************************** Module Header ******************************\

* Module Name:  NativeMethod.cs

* Project:      CSPInvokeDll

* Copyright (c) Microsoft Corporation.

* 

* The PInvoke signatures of the methods exported from the unmanaged DLLs.

* 

* This source is subject to the Microsoft Public License.

* See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.

* All other rights reserved.

* 

* THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, 

* EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED 

* WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.

\***************************************************************************/



#region Using directives

using System;

using System.Runtime.InteropServices;

using System.Text;

using System.Security;

#endregion





namespace CSPInvokeDll

{

    // Function delegate of the 'PFN_COMPARE' callback function. 

    // The delegate type has the UnmanagedFunctionPointerAttribute. Using 

    // this attribute, you can specify the calling convention of the native 

    // function pointer type. In the native API's header file, the callback 

    // PFN_COMPARE is defined as __stdcall (CALLBACK), so here we specify 

    // CallingConvention.StdCall.

    [UnmanagedFunctionPointer(CallingConvention.StdCall)]

    delegate int CompareCallback(int a, int b);





    [SuppressUnmanagedCodeSecurity]

    class NativeMethod

    {

        [DllImport("CppDynamicLinkLibrary.dll", CharSet = CharSet.Auto,

            CallingConvention = CallingConvention.Cdecl)]

        public static extern int GetStringLength1(string str);



        [DllImport("CppDynamicLinkLibrary.dll", CharSet = CharSet.Auto,

            CallingConvention = CallingConvention.StdCall)]

        public static extern int GetStringLength2(string str);



        [DllImport("CppDynamicLinkLibrary.dll", CharSet = CharSet.Auto)]

        public static extern int Max(int a, int b, CompareCallback cmpFunc);



        [DllImport("user32.dll", CharSet = CharSet.Auto)]

        public static extern MessageBoxResult MessageBox(IntPtr hWnd,

            string text, String caption, MessageBoxOptions options);



        [DllImport("msvcrt.dll", CharSet = CharSet.Ansi,

            CallingConvention = CallingConvention.Cdecl)]

        public static extern int printf(string format, string arg1, string arg2);

    }





    /// <summary>

    /// Flags that define appearance and behaviour of a standard message 

    /// box displayed by a call to the MessageBox function.

    /// </summary>

    [Flags]

    enum MessageBoxOptions : uint

    {

        Ok = 0x000000,

        OkCancel = 0x000001,

        AbortRetryIgnore = 0x000002,

        YesNoCancel = 0x000003,

        YesNo = 0x000004,

        RetryCancel = 0x000005,

        CancelTryContinue = 0x000006,



        IconHand = 0x000010,

        IconQuestion = 0x000020,

        IconExclamation = 0x000030,

        IconAsterisk = 0x000040,

        UserIcon = 0x000080,



        IconWarning = IconExclamation,

        IconError = IconHand,

        IconInformation = IconAsterisk,

        IconStop = IconHand,



        DefButton1 = 0x000000,

        DefButton2 = 0x000100,

        DefButton3 = 0x000200,

        DefButton4 = 0x000300,



        ApplicationModal = 0x000000,

        SystemModal = 0x001000,

        TaskModal = 0x002000,



        Help = 0x004000, // Help Button

        NoFocus = 0x008000,



        SetForeground = 0x010000,

        DefaultDesktopOnly = 0x020000,

        Topmost = 0x040000,

        Right = 0x080000,

        RTLReading = 0x100000,

    }





    /// <summary>

    /// Represents possible values returned by the MessageBox function.

    /// </summary>

    enum MessageBoxResult : uint

    {

        Ok = 1, Cancel, Abort, Retry, Ignore,

        Yes, No, Close, Help, TryAgain, Continue,

        Timeout = 32000

    }

}