To add a floating picture to the document, use the ShapeCollection.InsertPicture method.
document.AppendText("Line One\nLine Two\nLine Three");
Shape myPicture = document.Shapes.InsertPicture(document.CreatePosition(15),
System.Drawing.Image.FromFile("beverages.png"));
myPicture.HorizontalAlignment = ShapeHorizontalAlignment.Center;
document.AppendText("Line One" & vbLf & "Line Two" & vbLf & "Line Three")
Dim myPicture As Shape = document.Shapes.InsertPicture(document.CreatePosition(15), System.Drawing.Image.FromFile("beverages.png"))
myPicture.HorizontalAlignment = ShapeHorizontalAlignment.Center