can any expert summarize the client side controls?

[hhw]

Microsoft concentrates on the server side solutions such as web controls
,web services.But I think only focus on server side will must result in the
bad performance .But in .net I can't find the documnet detail in client
side problem.
I know vbscript,jscript,favascript ,plugin and activex can work in client
but they are difficult to program.Now in .net I know some .net componets can
be pluged into IE that need client side .net envionment and full
confidence,such as some "user windows form controls".Can all the "windows
form controls" be rendered in IE? Dose any other type .net controls can be
rendered in IE? Can I put COM componets in the "custom windows form user
control" and render in IE? I am confuse about Microsoft 's client side
technology,and I think not only myself .

thanks experts a lot .