Right click on your project
select – properties
select – application
Change – output type to class library
select – assembly info
check – make assembly COM-Visible

add new item
custom control
in code change the inhertiance to whatever picturebox, textbox….
put ur custom code there.

In your new project, right click on your project references
add reference
Browse…
Find you custom dll (should be in debug or release folder)
add your custom control dll
should show up in your toolbox
if not, right click on your toolbox and select – Choose Item

I hope this helps someone out there…