Making reusable custom combo box control

Question

Hi all,

I wrote some code for image combo box where I display the drives with images.

Its working fine. The combo box is in a form.

Now what I want to know is that can I make this combo box as just another control

like our regular combo box. I mean it should be like when I drag this combo box

or when i write some code for instatiating this combo box ...

automatically thouse drive and images of the local system shuld get into the combo box.

I don'nt have any Idea abt makin custom controls...

Do any one help me plz...or just sum hint how can I accomplish this task..

thanks...