public void Activate(Inventor.ApplicationAddInSite addInSiteObject, bool firstTime)
{
m_inventorApplication = addInSiteObject.Application;
m_ApplicationEvents = m_inventorApplication.ApplicationEvents;
m_ApplicationEvents.OnOpenDocument += this.m_ApplicationEvents_OnOpenDocument;
mControlForm = new Form1(m_inventorApplication);
mControlForm.ShowModeless();
}