C# 更正来自 C++ 的托管代码

Question

我必须在我的 C# 应用程序中使用此外部函数“GetOpenedFiles”(更多信息:http://www.codeproject.com/KB/shell/OpenedFileFinder.aspx)。我不知道，因为我可以编写此函数的包装器:

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

原始 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# 应用程序:

    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);

如何在我的 C# 应用程序中正确使用此 dll 函数？

编辑:

这是我最新的代码片段，但从未调用回调函数:

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();
        }
    }

}

Answer 1

这是编码以下类型的方式:

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