Display text only while form is minimized

I want to display some timer text while my form1 is minimized ... I tried "From1.activeform.text = "mytimertextgoeshere" but that throws an exception and applies it to all forms that become active. How can I apply only to the main form and only when the minimize button is clicked?

VB Code:

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        If Me.WindowState = FormWindowState.Minimized Then
            Me.Text = "minimized"
        Else
            Me.Text = "not minimized"
        End If
    End Sub

use the WindowState property in code