How to check whether a certain user has add file permission to a list using web service.

[bin_bin1]

Hello, I am trying to check whether a user has the "add file" permission to a list using web service. Should I use Permissions.asmx or UserGroup.asmx. I searched online. But I could not find a good example to explain how this works. I am using SharePoint 2007. I cannot use SharePoint OM. Thank you so much Bin

[khKamel]

In Sharepoint 2010 i choose the list, click "Library Permission" then click check permission. :-D