how to add or integrate download accelerator to IE

Question

Dear All

I created one download accelerator using vb.net. now I integrate that application in IE(i.e when user click on any download link it should open my application instead of normal download window.
for example the system having Internet download manager(IDM) ,when we click on any download link in Internet explore it automatically open IDM instead of normal pop up. same thing I need to do in my application. please let me know how to integrate Application with IE.

Thanks Advance.

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suresh