After adding the control with
<span style="color: blue">&lt;</span><span style="color: #800000">GleamTech</span><span style="color: blue">:</span><span style="color: #800000">FileManagerControl</span><span style="color: blue">&gt;</span> 
tag in the markup, properties can be also set/overridden in code.
Some properties are set differently in code than in markup as they are not simple string types. Please refer to the example's source code to see how they are set.