/// <summary>
/// This method creates and shows a modeless dialog, unless it already exists.
/// </summary>
/// <remarks>
/// The external command invokes this on the end-user's request
/// </remarks>
///
public void ShowForm(UIApplication uiapp)
{
m_revit = uiapp;
m_document = uiapp.ActiveUIDocument.Document;
// If we do not have a dialog yet, create and show it
if (m_MyForm == null || m_MyForm.IsDisposed)
{
m_MyForm = new AppearanceAssetEditingForm();
m_MyForm.Show();
// if we have a dialog, we need Idling too
uiapp.Idling += IdlingHandler;
}
}