[Mohamad Anan]

و عليكم السلام و رحمة الله و بركاته

كود :

       TextBox17.Text = "20:30:00"
       TextBox5.Text = "06:00:00"
       Dim Duration As Double = TimeSpan.Parse(TextBox17.Text).TotalHours + TimeSpan.Parse(TextBox5.Text).TotalHours
       TextBox18.Text = Math.Floor(Duration) & ":" & (Duration Mod 1) * 60