About "adding new capture file format"

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<div>Dear all :</div>
<div>I am new to wireshrak, and I hava a problem about "add new capture file".</div>
<div>Wireshark can capture some file format such as "pcap".</div>
<div>But I want add a new capture file format.</div>
<div>According to the develop guide, I have to modify the "wtap" code.</div>
<div>But I don`t know how to modify it.</div>
<div>Could you provide some reference&nbsp;files or&nbsp;samples&nbsp;to me, thanks a lot.</div>
<div>p.s.Because I am not good at English (I am come from Taiwan),there may have&nbsp;some grammar error. </div>
<div>Thanks for your patients.</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; From&nbsp;Robert Lai&nbsp;&nbsp;</div>
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