Hi,
As I think after adding the control to the place-holder you should add handler. Like:
Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
dim linkbtn as new LinkButton
With lnkbtn
.Text = "Click Here"
.Font.Underline = False
End With
PlaceHolder1.Controls.Add(linkbtn)
AddHandler lnkbtn.Click, AddressOf LinkBtn_Click
End Sub
Protected Sub LinkBtn_Click(ByVal sender As Object, ByVal e As System.EventArgs)
MsgBox("Button is clicked")
End Sub
This is woriking for me and hope this will help you also.
All the best.
--Amit