public void ShowForm(UIApplication uiapp)
{
// If we do not have a dialog yet, create and show it
if (m_MyForm == null || !m_MyForm.IsActive)
{
// A new handler to handle request posting by the dialog
ExternalEventHandler handler = new ExternalEventHandler(uiapp);
// External Event for the dialog to use (to post requests)
ExternalEvent exEvent = ExternalEvent.Create(handler);
// We give the objects to the new dialog;
// The dialog becomes the owner responsible fore disposing them, eventually.
m_MyForm = new SelectParameters(uiapp, exEvent, handler);
m_MyForm.Show();
}
}