show message upon plugin activation

Personally haven’t done this, but I have seen this feature with

http://ww.wp.xz.cn/extend/plugins/w3-total-cache/

whenever a plugin is activated, it displays a message with buttons to clear the cache on the Admin Panel screen. See if these folks can give you tips on this, by asking the question at

http://ww.wp.xz.cn/support/plugin/w3-total-cache

Yes, they’ve already done that, so it’s easy for them to point you the directly how to do that. It’s probably executed via WP Hooks, just have to know the php source file to see how that is implemented.

It uses WP hooks, will work anywhere.