 <p>[Edit: I was mistaken. The only way this will work is by using Selection. The following code will work: </p> <pre><code>Sheet1.Shapes("Group 1").GroupItems("Spinner 1").Select Selection.Max = 20 </code></pre> <p>Obviously this is not ideal. Any further assistance would be grand.]</p> <p>After a fair bit of cajoling, I've managed to figure this one out. To access a form control that is grouped, you need to use the GroupObjects collection (a hidden member): </p> <pre><code>Sheet1.GroupObjects("Group 1").ShapeRange.GroupItems("Spinner 1").ControlFormat.Max </code></pre> <p>Hope that helps anyone else who might run into this issue!</p>