private void axMapControl1_OnMouseMove(object sender,
IMapControlEvents2_OnMouseMoveEvent e)
{
if (e.button != 1)
{
return;
}
IPoint pPoint = new ESRI.ArcGIS.Geometry.Point();
pPoint.PutCoords(e.mapX, e.mapY);
m_mapControl.CenterAt(pPoint);
m_mapControl.ActiveView.PartialRefresh(
esriViewDrawPhase.esriViewGeography, null, null);
}