GUI Script to load a program - how to reduce CPU usage

Hi all,

I wrote a little script intended to show up a GUI with a list you can select a program to load from.

The problem is that the selected program, once loaded, is heavily slowed down so the script must be "heavy" while running in the background...

here is the code:

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include "GUIScrollbars_Ex.au3"
#include <GuiListView.au3>
#include <Misc.au3>

Local $hDLL = DllOpen("user32.dll")
Local $hGUI

$hGUI = GUICreate("Select Program To Run", 250, 150,-1,-1,$WS_POPUP+$WS_BORDER)
GUISetBkColor(0x3790e8)

$listview = GUICtrlCreateListView("Select Program - press 1 to Run", 0, 0, 250,150, $LVS_SHOWSELALWAYS)
_GUICtrlListView_SetColumnWidth($listview, 0, 245)
GUICtrlSetBkColor(-1,0x3790e8)
$P1= GUICtrlCreateListViewItem("Program #1", $listview); ID 4
GUICtrlSetColor (-1, 0xFFFFFF)
$P2= GUICtrlCreateListViewItem("Program #2", $listview); ID 5
GUICtrlSetColor (-1, 0xFFFFFF)
$P3= GUICtrlCreateListViewItem("Program #3", $listview); ID 6
GUICtrlSetColor (-1, 0xFFFFFF)
$win= GUICtrlCreateListViewItem("Exit to Windows", $listview); ID 7
GUICtrlSetColor (-1, 0xFFFFFF)
$shutdown= GUICtrlCreateListViewItem("Shut Down PC", $listview); ID 8
GUICtrlSetColor (-1, 0xFFFFFF)

GUISetState(@SW_SHOW) ;shows the gui/menu/list

While 1
$GUIlistitem = GUICtrlRead($listView); reads the ID of the selected item in the list
;SplashTextOn ( "title", $GUIlistitem)
if Not (ProcessExists("P1.exe") Or ProcessExists("P2.exe") Or ProcessExists("P3.exe")) Then
If $GUIlistitem==4 And _IsPressed(31) Then ;31 -> Key 1
RunWait("C:/Programs/P1.exe")
nocycle()
EndIf
If $GUIlistitem==5 And _IsPressed(31) Then ;31 -> Key 1
RunWait("C:/Programs/P2.exe")
nocycle()
EndIf
If $GUIlistitem==6 And _IsPressed(31) Then ;31 -> Key 1
RunWait("C:/Programs/P3.exe")
nocycle()
EndIf
If $GUIlistitem==7 And _IsPressed(31) Then ;31 -> Key 1
Exit
nocycle()
EndIf
If $GUIlistitem==8 And _IsPressed(31) Then ;31 -> Key 1
Shutdown(1)
nocycle()
EndIf
Sleep(200)
EndIf
WEnd

Func nocycle()
While _IsPressed(31, $hDLL)
Sleep(500)
WEnd
EndFunc

DllClose($hDLL)

I am not a coder so there should be something of macroscopic i cannot see...

If you have some idea on how to improve this "badly-drawn-boy" please tell me

Thanks for the help!