Is there a flag that allows users to select multiple files at one time from the browse window?  As far as I can tell, if you want to upload five files, you have to press browse and select a file,  browse and select a file, browse and select a file, browse and select a file, etc. 

Have I missed a setting or property?

Thanks,
Kevin

The control doesn't support to select multiple files at one time, because we use default "file input" html element.