Change file/folder icon programmatically

Hello. I would like to know if there is any way to programmatically modify the icon of a specific file or folder. The objective pursued is to connect the control to a database and change the color of the icons according to a download flag( if the files have been downloaded or not)
Thanks

Hi Miguel,
This would be a hard task if you don't have the source code. Let me know if you are interested in upgrading.