Correct C# class method to get data from DLL using dllimport

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I am using DLLImport in a C# project for the first time.  I have not found the right way to specify a class method to get data from the DLL.  Here is my code; the public void CallDLL is not correct.  Any help with the right method call would be very appreciated.  

    internal static class NativeMethods
    {
        [DllImport("SMA_03_Process.dll", EntryPoint="S0Process")]
        public static extern int ReturnVal(int a, int b);
    }

        public void CallDLL
        {
            int Value;
            Value = S0Process;
        }
    }

What I have tried:

Other method headers with different constructions, none of which have been correct.

Posted 8-Jul-17 10:14am

Member 13300090

Updated 10-Jul-17 3:09am

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User 7407470 · Answer 1 · 2017-07-08T10:48:00

Solution 1

C#

public void CallDLL()
{
    int a = 2; // example
    int b = 3; // example

    int Value = NativeMethods.ReturnVal(a, b);

    // ...
}

Posted 8-Jul-17 10:48am

User 7407470

Updated 8-Jul-17 10:52am

v2

Member 13300090 · Answer 2 · 2017-07-08T11:23:00

Solution 2

So far so good, but the compiler responds:

A get or set accessor expected

Where does the call for the get accessor go?

Posted 8-Jul-17 11:23am

Member 13300090

Comments

[no name] 8-Jul-17 17:31pm

You forgot the () after CallDLL, making it a Property instead of a Method.
So make it a property by adding a Get and/or Set, or add the ()...

Member 13300090 10-Jul-17 9:10am

Thank you Peter; I will try that.