TX Text Control .NET for WPF Reference GuideTXTextControl.WPF Namespace TextControl Class BorderThickness Property
Gets or sets the border thickness of the Text Control. Four double values, in device-independent units (1/96th inch), describe the left, top, right, and bottom sides of the border, respectively. If only a single measure is specified, that measure is applied to all of the left, top, right, bottom values of a Thickness. If only a pair of left,top measures are specified, these measures are applied symmetrically to a Thickness: the left value is used for right; the top value is used for bottom. This is a dependency property.
public System.Windows.Thickness BorderThickness { get; set; }Public Property BorderThickness() As System.Windows.Thickness