Andrew-

I need a similar feature on one of my applications, luckily I had some
leadway on where exactly the button was position, though I could not make it
a ToolStrip button along the top of the form.

What I did was:
I added a Panel Control to my form and made it small, a little larger then
the size I needed.
Next, I added a ToolStrip Container Control into the small panel and only
selected Top.
I then added a ToolStrip Control to the ToolStrip Container Control added
the two SplitButtons to the ToolStrip with the drop down and set the
properties as needed on my ToolStrip Buttons and ToolStrip Control.
You can set the properties on the ToolStrip Containter, ToolStrip and
Buttons so that you won't really be able to distinguish it from a 'normal'
button control.

If you come up with an alternate solution, let me know - I would be
interested to hear how you implement this.

Thanks-

Tony Wissler
tewissler@REMOVEME.gmail.com
Dad, MCP, MCSE