title: SkinID on usercontrol
body: <p>I have created a usercontrol (a custom button control), how to apply skin on that control.
  What to write in the skin file for eg for a asp:button i will write <code>&lt;asp:button SkinID ="btnSkinBlue" runat = "server"/&gt;</code>.</p>
  
  <p>What to write for a user control?</p>