C#

bonosa wrote:

It does not compile sayiing the c++ is expecting a pointer to a structure. I thought making it an & is the same as passing by ref?

struct hdf_call_vars_t {
	int foo;
};

public ref class Class1 {
	public:
        int read_file(const char * file_path, hdf_call_vars_t & ret_vals);
};

int Class1::read_file(const char * file_path, hdf_call_vars_t & ret_vals)
{
	Console::WriteLine(ret_vals.foo);
	return 1;
}

int main(array<System::String ^> ^args)
{    
	hdf_call_vars_t instance;
	instance.foo = 10;
	Class1^ c = gcnew Class1;
	c->read_file("A string", instance);
        return 0;
}

// ClassLibrary.h

using namespace System;

namespace Example {

	// Native struct
	struct hdf_call_vars_t {
		int foo;
	};

	// This wraps the native hdf_call_vars_t and provides managed class
	public ref class HdfCallVars
	{
	private:
		hdf_call_vars_t* native;

	public:
		HdfCallVars()
		{
			native = new hdf_call_vars_t;
		}

		property int Foo
		{
			int get()
			{
				return native->foo;
			}
			void set(int value)
			{
				native->foo = value;
			}
		}
	};


	// This is your libraries main class
	public ref class YourLibrary {
	public:
		// This method now takes managed objects
		int ReadFile(String^ file_path, HdfCallVars^ ret_vals)
		{
			// your code goes here
			return ret_vals->Foo;
		}
	};
}

using System;
using Example;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            HdfCallVars vars = new HdfCallVars();
            vars.Foo = 10;  // Doing native call through well defined interface

            YourLibrary library = new YourLibrary();
            int status = library.ReadFile("filepath", vars);
            Console.WriteLine(status);
            Console.Read();
        }
    }
}

bonosa wrote:

But do I need to make Channel Vars a wrapper class also?

int atClass1::read_file
(String^ file_path,	/* Path tofile */
 HdfCallVars % ret_vals)

/* Iterate through the links, filling in needed data as discovered. */
 io_err = H5Literate (group_id, H5_INDEX_NAME, H5_ITER_NATIVE,

              &i, get_data,  (void*)&ret_vals);

bonosa wrote:

the compiler doesn't like (void*)&ret_vals....

NarVish wrote:

if (sc.Status.ToString().Equals("Stopped"))

if (sc.Status == ServiceControllerStatus.Stopped) {
   sc.Start();
}

NarVish wrote:

I would like to ask for credentials before the user tries to start service.