User Controls c#

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C#

C#4.0

Inagine I've a container control that represents a motherboard
and some child controls (one for CPU, Memory and several I/O devices)

I'd like to know how can i create a user control for the data bus
I mean a control, that can be modifified in its shape vertically and
horizontally at design tine and in several places to connect the CPU
with RAM and I/O devices in a smart way.

I'd like to know how to specify the services offered at design time
to use the mouse