[Fareed]

ضع 2 تايمر
بحيث الاول مضبوط على 5 دقايق
والثاني على 10 دقايق
وكل واحد منهم يوقف نفسه ويشغل الاخر
مثال
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
    Timer1.Interval = 300000
    Timer2.Interval = 600000
End Sub

Private Sub Timer1_Tick(ByVal sender As Object, ByVal e As EventArgs) Handles Timer1.Tick
    Timer1.Stop()
    Timer2.Start()
End Sub

Private Sub Timer2_Tick(ByVal sender As Object, ByVal e As EventArgs) Handles Timer2.Tick
    Timer2.Stop()
    Timer1.Start()
End Sub