protected IWindowFrame ShowWindow(string windowType, string windowTitle, object docItem, IWindowPane innerPane)
{
var windowFrame = shellUiSvc.FindDocumentWindow(windowType, docItem);
if (windowFrame == null)
{
windowFrame = shellUiSvc.CreateDocumentWindow(windowType, docItem, windowTitle, innerPane);
}
windowFrame.Show();
return(windowFrame);
}