Call win forms from native cobol program with copy books


I am new to visual cobol and 3 yrs exp to Visual Studio.

We have requirement where we need to design a win forms using VS and write a cobol program which will call these win forms. We will set some values in copy book from the cobol program and pass that copy book to win forms for displaying data to user.

The Cobol Program is the entry point which will invoke win forms based on certain condition.

The cobol program should be of native project type and win forms should be of manged type.

I did some googling and was able to call win forms but when I add copy books as parameter to a method I am not able to make a call. I am getting error  saying "The parameter name is incorrect".

I have added a sample project file of my work.