[tlug] Visio-to-PNG Batch Conversion - Possible?

["Lyle H Saxon" <llletters@example.com>]

I often have to convert Visio image files (usually line drawings,
sometimes photos with call-outs) into .png.  As it is, I have to open
each and every bloody file to convert it by saving it as .png.  Is
there a way to batch convert these?  I'm stuck with a bloody w-box at
work, but there are test machines available at work that could be set
up with Linux for the job....

Lyle