I am trying to create a custom symbol using CreateCustomSymbol API in my code. ( symbol is square with an X inside it )

This is how my gtol.sym file looks like

I want to create this symbol using the API CreateCustomSymbol , however i am not able to understand how to construct the input parameters to this API.

Dim Segments As Object 
Dim Points As Object 
Dim Notes As Object 
Dim value As Object   
value = instance.CreateCustomSymbol(Segments, Points, Notes)
// How do i construct the parameters to this API ??

Aniket.