Detecting Time Period

[=sinister=]

Is there a way to detect how long a user it holding down a button? Ex. You use a hotkey for W, and it will see how long the user holds it down.

[SmOke_N]

#include <misc.au3>

While 1
    If _IsPressed('01') Then
        $TimeHeld = TimerInit()
        While _IsPressed('01')
        ;do nothing
        Wend
        MsgBox(0, 'Time Test', 'The left mouse button was held down for: ' & Round(TimerDiff($TimeHeld) / 1000, 2) & ' seconds')
    EndIf
    Sleep(10)
Wend