Form1_Load()
Timer1.Start()
Timer1.Intreval = 1

Timer1_Tick()
If Checkbox1.Checked = True Then
Textbox1.Text = "Check 1 tiklendi"
End If
If Checkbox1.Checked = True And Checkbox2.Checked = True Then
Textbox1.Text = "Check 1 ve 2 tiklendi"
End If
End Sub