Gets the horizontal size of the visible content area.
Assembly: PresentationFramework (in PresentationFramework.dll)
Property ValueType: System.Double
A floating-point value that specifies the horizontal size of the visible content area, in device-independent units (1/96th inch per unit).
The value of this property is 0.0 if the text editing control is not configured to support scrolling.
This property has no default value.
The following example demonstrates how to read the value of the property.
Private Sub initValues(ByVal sender As Object, ByVal e As EventArgs) myTB1.Text = "ExtentHeight is currently " + myTextBox.ExtentHeight.ToString() myTB2.Text = "ExtentWidth is currently " + myTextBox.ExtentWidth.ToString() myTB3.Text = "HorizontalOffset is currently " + myTextBox.HorizontalOffset.ToString() myTB4.Text = "VerticalOffset is currently " + myTextBox.VerticalOffset.ToString() myTB5.Text = "ViewportHeight is currently " + myTextBox.ViewportHeight.ToString() myTB6.Text = "ViewportWidth is currently " + myTextBox.ViewportWidth.ToString() radiobtn1.IsChecked = True
Windows 8.1, Windows Server 2012 R2, 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.