Detect if Mouse is left Clicked

How do i detect if left mouse is clicked...

You probably know that you can use the MouseDown event and
set button to 1, or you can use subclassing and trap the
WM_LMOUSEDOWN (I think that's what it's called) event.

(If you mean the right button, you would set button to 2 or
WM_RMOUSEDOWN when subclassing.)

Hope it helps,

Me

I mean the mouse is clicked any time, and any where like on the desktop....