unexpected cpu usage of target programs called in AutoIt script

[DragonBall]

I made a script like the following:

Run("ProgA.exe")
While 1
    sleep(20)
    If ProcessExists("ProgA.exe") = 0 Then
        ProcessClose("ProgB.exe")
        Exit
    ElseIf WinActive("ProgA") Then
        ( let ProgA)  do "somethings"
    EndIf
WEnd

When I run it, everything work fine. But there is a problem:

When I click the mouse to any other program than ProgA, then the windows of ProgA is not active.

But in taskmanager, I found that ProgA.exe still use 1%~2% cpu. If I change the sleep timer smaller in "somethings", then ProgA.exe use more cpu. It's weired because when the window of ProgA is not activate, then ProgA will do nothing? Do I miss something?

[bogQ]

well did you code programA to work only if it main win state is active?

your missing that script still check if win is active and if process exsist

on the other hand i whud do loop probably like this

While 1
    sleep(20)
    Select
        Case WinActive("ProgA")
            ;let ProgA do somethings
        Case ProcessExists("ProgB.exe")
            If Not ProcessExists("ProgA.exe") Then
                ProcessClose("ProgB.exe")
                Exit
            EndIf
    EndSelect
WEnd

Edited November 11, 2011 by bogQ