task is to change a value in a listbox to another value,

e.g

3.40

changing the price of 3.40 to 4.30 :/ if u get me!

Well heres the code that i thought it may be but i dont no sory biggest newb here

VB Code:
  1. Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

  2.          lstboxpric.SelectedItem = numhire.Value + lstboxpric.SelectedItem

  3.  
  4.     End Sub