Calling C DLL method from C# Code

// c_dll.cpp : Defines the exported functions for the DLL application.
//
 
#include "stdafx.h"
#include <stdio.h>
#include "windows.h"
 
 
__declspec(dllexport) BOOL MyGetData(char* pszName, int *pnAge, char *pszAddress,
						  long *pIDOB, float *pfSal, double *pdSal,
						  UINT * puPhone, char *byte, BOOL pbVal) {
	  printf("pszName = %s \n"
		     "pnAge = %d\n"
			 "pszAddress = %x\n"
			 "long pIdoB = %d", pszName, *pnAge, pszAddress,
			 *pIDOB);
		   *pIDOB = 100;
	  return TRUE;
}
 
This is the C side I just ignore a few parameter....
This is the C# side
using System;
using System.Runtime.InteropServices;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
 
 
 
namespace EE_Examples
{
    class Program
    {
        [DllImport("h:\\programming\\EE_Examples\\Debug\\c_dll.dll")]
        static extern bool MyGetData(String pszName, out long pnAge,
                                 Byte address, out long pIODB,
                                 out float pfSal, out double pdSal,
                                 out uint puPhone,
                                 Byte anotherAddress, bool flag);
 
 
 
        static void Main(string[] args)
        {
            int i = 10;
            string pszName = "some name";
 
            long pnAge = 0;
            Byte foo = 0;
            float floatVal;
            double dVal;
            Byte dummy = 0;
            long pIODB;
            uint puPhone = 0;
            bool b_rval;
            b_rval = MyGetData(pszName, out pnAge, foo, out pIODB,
                               out floatVal, out dVal, out puPhone, dummy, true);
            Console.WriteLine("pioDB is now {0}", pIODB);
 
 
        }
    }
}

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