control caching and IIS 6.0 compression

[Steve]

Hello. We will be turning on compression on Windows Server 2003/ IIS 6.0
for our asp.net 2.0 website. Someone said that pages cannot be cached (at
least under certain circumstances). But what about user controls? I would
cache the
controls using VaryByParam pr VaryByCustom. Is this possible?

Thanks for your help in advance