Custom Control (COM) for use in Excel

I need to have a custom control developed that can be placed on an Excel worksheet. It will have the following capabilities: -Based on the browser control (or something similar) -Allow selection and ordinal marking of data items on a database driven web page. For example, on a real estate website: price, bedrooms, baths, etc. In that example, the value for price would be highlighted on the control and marked as #1, the value for bedrooms would be highlighted on the control and marked as #2, and the value for baths would me highlighted and marked as #3. -Similar to how FireBug operates, a data field should highlight when the mouse is over it. But then, if you click on the field it should be added to the ordinal list and remain highlighted with the ordinal marking. -The list of fields (#1, #2, #3, etc.) should be properties of the custom control. CONTINUED BELOW... -------------------------------------------- ## Deliverables In your proposal, please answer these questions: How long? What experience do you have creating custom controls?