Send a char from .NET

Hi,

I have a function where the input is a 'char'. I have exported this function with the compiler and imported it on my .NET application. For the others functions where as an input i'm using a double i can use the following:

 testClassMatlab cl = null;
 MWNumericArray input = null;
 MWNumericArray output = null;
 MWNumericArray output1 = null;

 MWArray[] result = null;

            // Initialise our new matlab object 
             cl = new testClassMatlab();     
             input = 6;

             // Make the call to the method we exported
             result = cl.makesquare(2, input );

This is an example: http://uk.mathworks.com/help/compiler_sdk/dotnet/integrate-your-net-assembly-into-a-c-application.html

It is working fine. But with a char -> string i have tried the following but without success:

 MWCharArray input = null;
 input = "p";
 result = cl.MtbRM1(2,input);

It look like that the format of the input is not correct.

Any help?

Thanks!

Simone