'Declaration Protected Overrides Function ValidateFocusSite( _ ByVal focusSite As Object, _ ByRef errorMessage As Exception _ ) As Boolean
protected override bool ValidateFocusSite( object focusSite, out Exception errorMessage )
XamComboEditor's implementation of ValidateFocusSite makes sure that the focus site is a TextBox.
See ValueEditor's ValueEditor.ValidateFocusSite for more information.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2