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POC# Correct managed code from C++
 

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    <p>I have to use this external functions "GetOpenedFiles" (more info to: <a href="http://www.codeproject.com/KB/shell/OpenedFileFinder.aspx" rel="nofollow">http://www.codeproject.com/KB/shell/OpenedFileFinder.aspx</a>) into my C# application. I don't know as I can write a wrapper of this function:</p> <pre><code>void GetOpenedFiles(LPCWSTR lpPath, OF_TYPE Filter, OF_CALLBACK CallBackProc, UINT_PTR pUserContext); </code></pre> <p><em><strong></em> ORIGINAL C++ CODE (OpenFilefinder.h)</strong></p> <pre><code>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 ); </code></pre> <p><strong>MY C# APPLICATION:</strong> </p> <pre><code> 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); </code></pre> <p>How can I use this dll function correctly in my C# app?</p> <p>EDIT:</p> <p>This is my latest snippet, but never invoke callback function:</p> <pre><code>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(); } } } </code></pre>
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