How To Pass Hyperlink Into RichTextBox

In the following code I have an OpenFile() Function which opens a fileDialogBox, I then select my file (which will be a PDF) and return it back. My question is....When I get the filename and path, is there a way to take this path and put it into a textbox or richtextbox as a hyperlink? I want the user to be able to view the file once it has been selected and displayed on the form. But when I tried the following:
Code:
RichTextBox1.InsertLink("linktext", "linkurl.html")
It said the "insertLink" was not a member of richtextbox. But i see examples of it all over the net.

Here is the code I have so far just passing the string to the textbox and richtextbox, I just need it to be passed as a hyperlink to the file location.
Code:
Private Sub btnOpenFile_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAttachDoc.Click
'declare a string to the filename
Dim strFileNameAndPath As String = Open File()
If (strFileNameAndPath = "") Then
MsgBox("You did not select a file!")
[Code] .....