private void RegisterSelChangedEventAT(object state)
{
IUIAutomationElement elem = null;
try {
pAutomation.ElementFromHandle(handler.GetHwnd(), out elem);
if (elem != null)
{
pAutomation.AddAutomationEventHandler(UIA_Selection_InvalidatedEventId,
elem, TreeScope_Element, IntPtr.Zero, handler);
pAutomation.AddAutomationEventHandler(UIA_SelectionItem_ElementAddedToSelectionEventId,
elem, TreeScope_Descendants, IntPtr.Zero, handler);
pAutomation.AddAutomationEventHandler(UIA_SelectionItem_ElementRemovedFromSelectionEventId,
elem, TreeScope_Descendants, IntPtr.Zero, handler);
pAutomation.AddAutomationEventHandler(UIA_SelectionItem_ElementSelectedEventId,
elem, TreeScope_Descendants, IntPtr.Zero, handler);
}
}
catch (Exception ex) {
}
finally {
if (elem != null)
{
Marshal.ReleaseComObject(elem);
}
((AutoResetEvent)state).Set();
}
}
public override void Init()
{
IUIAutomation uia = this.IUIAutomation;
if (uia != null)
{
uia.AddAutomationEventHandler(this.EventId, this.Element, this.Scope, null, this);
this.IsHooked = true;
}
}