notateXpress1.ClientWindow = imageXView1.Handle;
notateXpress2.ClientWindow = imageXView2.Handle;
imageXView1.Image = Accusoft.ImagXpress10.Net.ImageX.FromFile(ImagXpress1, "c:\\images\\MyFirstImage.tif");
            
// Make sure the second image is not loaded, but referenced to the first image
imageXView2.Image = imageXView1.Image;
Accusoft.NotateXpressSdk.Layer layer1 = new Accusoft.NotateXpressSdk.Layer();
notateXpress1.Layers.Add(layer1);
            
// Turn on the toolbar on the first imagXView for drawing
notateXpress1.ToolbarDefaults.ToolbarActivated = true;
            
// AFTER interactive or programmatic drawing is complete
            
// call ForceAllUpdate to send annotations from notateXpress1 to notateXpress2
private void buttonFAU_Click(object sender, EventArgs e)
{
   notateXpress1.ForceAllUpdate();
}