C＃从C++更正托管代码

问题描述：

我必须将这个外部函数“GetOpenedFiles”（更多信息：http://www.codeproject.com/KB/shell/OpenedFileFinder.aspx）用到我的C＃应用程序中。我不知道，因为我可以写这个功能的包装：C＃从C++更正托管代码

void GetOpenedFiles(LPCWSTR lpPath, OF_TYPE Filter, OF_CALLBACK CallBackProc, UINT_PTR pUserContext);

原来的C++代码（OpenFilefinder.h）

enum OF_TYPE 
{ 
    FILES_ONLY = 1, 
    MODULES_ONLY = 2, 
    ALL_TYPES = 3 
}; 

struct OF_INFO_t 
{ 
    DWORD dwPID; 
    LPCWSTR lpFile; 
    HANDLE hFile; 
}; 

typedef void (CALLBACK* OF_CALLBACK)(OF_INFO_t OpenedFileInf0, UINT_PTR uUserContext); 


extern "C" __declspec(dllexport) void ShowOpenedFiles(LPCWSTR lpPath); 
extern "C" __declspec(dllexport) void GetOpenedFiles(LPCWSTR lpPath, 
                 OF_TYPE Filter, 
                 OF_CALLBACK CallBackProc, 
                 UINT_PTR pUserContext);

我的C＃应用：

public enum OF_TYPE : int 
    { 
     FILES_ONLY = 1, 
     MODULES_ONLY = 2, 
     ALL_TYPES = 3 
    } 

    public struct OF_INFO_t 
    { 
     ?????? dwPID; 
     ?????? lpFile; 
     ?????? hFile; 
    } 

    [DllImport("OpenFileFinder.dll", EntryPoint = "GetOpenedFiles")] 
    static extern void GetOpenedFiles(??????? lpPath, OF_TYPE filter, ????? CallBackProc, ????? pUserContext);

如何使用此dll函数corr真的在我的C＃应用程序？

编辑：

这是我最新的片断，但从来没有调用回调函数：

namespace Open64 
{ 
    class Program 
    { 

     public Program() 
     { 
      GetOpenedFiles("C:\\", OF_TYPE.ALL_TYPES, CallbackFunction, UIntPtr.Zero); 
     } 

     //void GetOpenedFiles(LPCWSTR lpPath, OF_TYPE Filter, OF_CALLBACK CallBackProc, UINT_PTR pUserContext); 

     public enum OF_TYPE : int 
     { 
      FILES_ONLY = 1, 
      MODULES_ONLY = 2, 
      ALL_TYPES = 3 
     } 

     public struct OF_INFO_t 
     { 
      Int32 dwPID; 
      String lpFile; 
      IntPtr hFile; 
     } 

     public delegate void CallbackFunctionDef(OF_INFO_t info, IntPtr context); 

     [DllImport("OpenFileFinder.dll", EntryPoint = "GetOpenedFiles")] 
     static extern void GetOpenedFiles(string lpPath, OF_TYPE filter, CallbackFunctionDef CallBackProc, UIntPtr pUserContext); 

     public void CallbackFunction(OF_INFO_t info, IntPtr context) 
     { 
      Console.WriteLine("asd"); 
     } 

     [STAThread] 
     static void Main() 
     { 
      new Program(); 
     } 
    } 

}

答

public struct OF_INFO_t 
{ 
    Int32 dwPID; 
    String lpFile; 
    IntPtr hFile; 
} 

public delegate void CallbackFunctionDef(OF_INFO_t info, UIntPtr context); 

[DllImport("OpenFileFinder.dll", EntryPoint = "GetOpenedFiles")] 
static extern void GetOpenedFiles(string lpPath, OF_TYPE filter, CallbackFunctionDef CallBackProc, UIntPtr pUserContext);

编辑：这是完整的程序

class Program 
{ 
    public Program() 
    { 
     GetOpenedFiles("C:\\", OF_TYPE.ALL_TYPES, CallbackFunction, UIntPtr.Zero); 
     Console.ReadKey(); 
    } 

    //void GetOpenedFiles(LPCWSTR lpPath, OF_TYPE Filter, OF_CALLBACK CallBackProc, UINT_PTR pUserContext); 

    public enum OF_TYPE : int 
    { 
     FILES_ONLY = 1, 
     MODULES_ONLY = 2, 
     ALL_TYPES = 3 
    } 

    [StructLayout(LayoutKind.Sequential,CharSet = CharSet.Unicode)] 
    public struct OF_INFO_t 
    { 
     public Int32 dwPID; 
     public String lpFile; 
     public IntPtr hFile; 
    } 

    public delegate void CallbackFunctionDef(OF_INFO_t info, IntPtr context); 

    [DllImport("OpenFileFinder.dll", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Unicode, EntryPoint = "GetOpenedFiles")] 
    static extern void GetOpenedFiles(string lpPath, OF_TYPE filter, CallbackFunctionDef CallBackProc, UIntPtr pUserContext); 

    public void CallbackFunction(OF_INFO_t info, IntPtr context) 
    { 
     //List the files 
     Console.WriteLine(info.lpFile); 
    } 

    [STAThread] 
    static void Main() 
    { 
     new Program(); 
    } 
}

我认为你的意思是在'委托'中的'IntPtr'作为'UIntPtr'，按照原始代码以及可能在代码末尾的右括号和分号。 :) +1虽然 – Maverik

感谢您的回复。我怎样才能将CallbackFunctionDef声明为我的回调函数？ – CeccoCQ

任何具有相同签名的方法都应该这样做。例如：'void SomeCallback（OF_INFO_t info，UIntPtr context）{/ * code here * /}' –

答

这是你将如何元帅以下几种类型：

DWORD => Int32 
LPCWSTR => String 
HANDLE => IntPtr 
UINT_PTR => UIntPtr

C＃从C++更正托管代码

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