dotNETportal.cz

Ahoj, dá se to udělat třeba takhle:

na formulář si přidej NotifyIcon a vyzkoušej tenhle kód

Public Class Form1

    Private Sub NotifyIcon1_MouseDoubleClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles NotifyIcon1.MouseDoubleClick
        Select Case Me.Visible
            Case False
                Me.Show()
                Me.WindowState = FormWindowState.Normal
            Case True
                Me.Hide()
        End Select
    End Sub

    Private Sub Form1_Resize(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Resize
        If Me.WindowState = FormWindowState.Minimized Then Me.Hide()
    End Sub
End Class

Zkuste událost Me.WindowStateChanged.