How do I create a button with rounded edges on Microsoft Outlook?

<!--[if mso]>
    <v:roundrect   href="#" style="height:44px;v-text-anchor:middle;width:225px;" arcsize="10%" stroke="f" fillcolor="#0596D5">
    <w:anchorlock/>
    <center>
<![endif]-->
<a href="#" style="background: #0596D5; border-radius: 2px; color: #FAFCFB; display: inline-block; font-size: 14px; line-height: 16px; letter-spacing: .5; padding: 8px 17px; text-align: center; text-decoration: none;" href="#">BUTTON TEXT GOES HERE</a>
<!--[if mso]>
    </center>
    </v:roundrect>
<![endif]-->