BMP TO JPEG Convert Automatic

Hi All

I would like to convert BMP files to JPEG files in with no user active automatic
so it scans the a folder for bmp files and convert them to jpg and then delete the bmp files
deleting is the easy bit.

I have looked at other post that uses dll's and cannot get them to work not sure if becuase i am using
windows 7 to run them or if there is away with out using plug-ins

Kind regards

Steve