Win32 API - unable to SetCapture properly

hi there

i am a beginner programmer and
reading Programming Windows 5th Edition.

my question: is it possible to capture mouse movements
outside client area without dragging the mouse...

i am only handling WM_LBUTTONDOWN message
so that one click SetCapture, the next click ReleaseCapture

eg.) in my program, my goal is to Click"center of client area,
then go outside my client area -- without Dragging the mouse--
and still be able to capture my mouse movements.

The book only presents a solution where
the user has to "drag" the mouse so that the mouse movement
is captured even oustide the client area.

Mouse Hook.

There are way too much threads about the same thing.