How to add stencils in visio file dynamically (C#)

I have One Visio document and one Stencil(.vss) file. Requirement: Add this stencil file inside the Visio document dynamically.

    private static void InsertStencilsToVisio()
    {           
        string fileName = @"C:\Visio Files\TestVisio.vdw";
        if (System.IO.File.Exists(fileName))
        {
            visioDocument = visioApplication.Documents.Open(fileName);
            visioPage = visioApplication.Window.Application.ActivePage;
            eswStencilDocument = visioPage.Application.Documents["eswstencil.vss"];
            CreateShapes();
        }
    }

Can I use VisOpenSaveArgs? to crack this. how to solve this.

siva