vb.net string indexof() ?

I this tutorial you can learn how to get a specified string indexof (string position) in main string to make this program steeps to be followed

Step1:

Open Microsoft visual studio 2010 or any older version also may differ commands

Step2:

Open file new project(ctrl+shift+n)àselect windows form applicationà rename as you wish

Step3:

Drag and drop two label, textbox, and one button

Label1.textàmain string

Label2.textàsub string

Buttonàget

Step4:

Copy and paste the following code

    Public Class Form1

   

    Private SubButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) HandlesButton1.Click

        Dim mianstring As String = TextBox1.Text

        Dim substring As String = TextBox2.Text

        MessageBox.Show(mianstring.IndexOf(TextBox2.Text))

    End Sub

End Class

Output: