HtmlElement.TabIndex Property
Gets or sets the location of this element in the tab order.
Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
TabIndex determines which element in an HTML document will next receive focus when the user presses the TAB key. By default, the only elements included in the tab order are INPUT elements, the SELECT control, and any element whose contentEditable property is set to true. You can include any HTML element in the tab order, such as a DIV, by assigning it an explicit TabIndex.
Valid values for TabIndex range from -32767 to 32767.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.