This is my code, I want to replace the word \"here\" with \"potato\" in the simplest way.
Private Sub btnreplace_Click(ByVal sender As System.Object, ByVal e As
since its a particular word you can use simple text replacement other than using regex.replace()
try this
txttyping.Text = Replace(txttyping.Text, "here", "potato")
here replace(sourcestring,findword,replaceword)