BeforeObjectChanged Event

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public event EventHandler<AnnBeforeObjectChangedEventArgs> BeforeObjectChanged

'Declaration
 
Public Event BeforeObjectChanged As EventHandler(Of AnnBeforeObjectChangedEventArgs)

'Usage
 
Dim instance As AnnAutomation
Dim handler As EventHandler(Of AnnBeforeObjectChangedEventArgs)
 
AddHandler instance.BeforeObjectChanged, handler

public event EventHandler<AnnBeforeObjectChangedEventArgs> BeforeObjectChanged

add_BeforeObjectChanged(function(sender, e))
remove_BeforeObjectChanged(function(sender, e))

public:
event EventHandler<AnnBeforeObjectChangedEventArgs^>^ BeforeObjectChanged

The event handler receives an argument of type AnnBeforeObjectChangedEventArgs containing data related to this event. The following AnnBeforeObjectChangedEventArgs properties provide information specific to this event.

Property	Description
Cancel	Gets or sets a value indicating whether the change should be canceled.
ChangeType	Gets the type of change.
Designer	Gets the designer responsible for the change.
Objects	Gets the objects that have been changed.

This event will be fired before an AnnObject is about to be modified by this AnnAutomation

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Public Sub AnnAutomation_BeforeObjectChanged(ByVal manager As AnnAutomationManager)
   ' subscribe to the BeforeObjectChanged of all automations
   For Each automation As AnnAutomation In manager.Automations
      AddHandler automation.BeforeObjectChanged, AddressOf automation_BeforeObjectChanged
   Next automation
End Sub
Private Sub automation_BeforeObjectChanged(ByVal sender As Object, ByVal e As AnnBeforeObjectChangedEventArgs)
   ' prevent changing the pen
   If e.ChangeType = AnnObjectChangedType.Pen Then
      e.Cancel = True
   End If
End Sub

public void AnnAutomation_BeforeObjectChanged(AnnAutomationManager manager)
{
   // subscribe to the BeforeObjectChanged of all automations
   foreach(AnnAutomation automation in manager.Automations)
      automation.BeforeObjectChanged += new EventHandler<AnnBeforeObjectChangedEventArgs>(automation_BeforeObjectChanged);
}
private void automation_BeforeObjectChanged(object sender, AnnBeforeObjectChangedEventArgs e)
{
   // prevent changing the pen
   if(e.ChangeType == AnnObjectChangedType.Pen)
      e.Cancel = true;
}

Target Platforms: Windows 7, 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

Reference

AnnAutomation Class
AnnAutomation Members