How can I detect left mouse is clicked?

[nhokdown]

Hi I try writing a keylog like "Perfect keylog"( blazingtools.com)

#include <ScreenCapture.au3>

$pos = MouseGetPos()

$x0=$pos[0]-50

$x1=$pos[0]+50

$y0=$pos[1]-50

$x1=$pos[1]+50

;; If MouseLeftClick() Then

_ScreenCapture_Capture(@MyDocumentsDir & "\GDIPlus_Image2.jpg", $x0, $y0, $x1, $y1)

But I don't know how to write Func MouseLeftClick()

Plz help me!

Sorry my bad english, I learn it at school not well:D

[SmOke_N]

_IsPressed(), I believe FireFox wrote some kind of UDF for it as well.

[nhokdown]

Grezz thank u so much^^