Hello!    

Can someone point me to a discussion or give an example of code please for changing sketch parameter in vb.net?

Do I need API sdk installed or not really ? Can I just create a windows form and reference Solidworks?

something similar to one below (which is not working),

Imports SldWorks

Imports System.Diagnostics

Imports System

Public Class Form1

    Dim swApp As SldWorks.SldWorks = CreateObject("SldWorks.Application")

    Dim swModel As SldWorks.ModelDoc2

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

    End Sub

    Private Sub btn_apply_Click(sender As Object, e As EventArgs) Handles btn_apply.Click

        swModel = swApp.ActiveDoc  ' <-----saying Additional information: Object reference not set to an instance of an object.

         swModel.Parameter("BH@Sketch1").SystemValue = 44

    End Sub

End Class