This property can be used for server-side validation.

This happens after the first postback. Initially it works correct, but after postback, if you select part of the entered text, and start typing, the caret begins to the begining, and the newly typed char goes at first position.

Please provide a web control that would simulate windows 8 tiles: dragging, live-ness, etc..

When i set the TextBox width to a percentage value i.e. 100% inside a table cell that has colspan > 1, the TextBox does not expand to fill the table cell. This problem occurs in IE 9 with Telerik ASP.NET AJAX Controls v2013.1.220.40. It works fine in FireFox and Chrome. Attached are the screenshots and a clean sample project (no browser specific code/css).