title: How do I base64 encode a string efficiently using Excel VBA?
body: <p>I need to encode a 100KB+ string as base64 in VBA. Are there any built-in functions or COM objects available which will do this as a pure VBA approach is either complex or doesn't scale well at these volumes (see links from <a href="http://www.vbforums.com/showthread.php?t=379072" rel="noreferrer">dbb</a> and <a href="http://www.motobit.com/tips/detpg_Base64Encode/" rel="noreferrer">marxidad</a>)?</p>