How to select and print a text?

[vbdotnetxt]

I have a RichTextBox control on my form1. I have two strings called firstStr and secondStr.

firstStr = "(123456)"

secondStr = "(1234567890)"

I want to select 123456 from the secondStr.

 

This is how I wanted to do it and print it to the RichTextBox:

 

secondStr.Select(1,7)
RichTextBox.Text = secondStr.SelectedText

 

but it doesn't work :(

 

this doesn't work either:

 

secondStr.SelectionStart = 1
secondStr.SelectionLength = 7
RichTextBox.Text = secondStr.SelectedText

 

I want to eventually compare the selected text with firstStr.

How can I do that?

[barski]

bool isEqual=firstStr.Equals(secondStr.SubString(0,6));