Hello, When i add this line in App.cs :Then zoom in and zoom out for explorer will not work ( IE for example) and that what i need. But if i zoom in or zoom out then open any telerik date picker, it will appear in other location of the screen. Please try these steps to reproduce the error : 1) Add the previous line of code to app.cs 2) Change zoom to 150% 3) Try to open any datepicker Regards, Jalalhost.Settings.EnableAutoZoom = false;