Can Flash dynamically load URL and Images from external html file uploaded elsewhere?

Hello, I'm just wondering, can Flash dynamically load URL and images from external html file uploaded elsewhere?

For instance, I make a button in flash. The button will get URL and read the variables from a html file. I upload a text file in Dropbox's public folder.

- Would the flash file be able to read the variables from the html file?

- Is it possible to update the html file in Dropbox to update the variables?

- Are there any security issues maybe?

Thanks for your time!