system wide api hook

What is the best way to do system wide user mode (NOT KERNEL MODE) api hook on Windows NT?

From stackoverflow

• Normally, you'd do this using SetWindowsHookEx. This allows you to hook into all applications on the current desktop.

  There are other options, though. This CodeProject article has a lot of details on hooking mechanisms.

• What kind of hooks? You can intercept event messages via hook apis.