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Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If InStr(textbox1.text, "tool") > 0 Then MsgBox("ok")
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim stp As String = "jfdkls;afjdtoolhfdjklsh"
If InStr(stp, "tool") > 0 Then MsgBox("ok")
End Sub