Syntaxhighlighter

Syntaxhighlighter
Supported languages
or for easy blogger installation see this post

How to make a frame in blog

Add this to the template:

pre {
padding: 10px;
font-size: 92%;
overflow: auto;
margin: 4px 0px;
width: 95%;
font-family: Courier;
border:1px solid #556688;
border-width:1px 1px;
display: block;
background-color: #FFFFFF;
}

Or use SyntaxHighlighter (for easy blogger installation see this post).