#include <GUIConstantsEx.au3>
$sFile = @SystemDir & '\shell32.dll'
$hGui1 = GUICreate('Test1', 200, 200, 10, -1)
GUISetIcon($sFile, 5)
$nButton1 = GUICtrlCreateButton('Gui2', 60, 20, 80, 40)
$nButton2 = GUICtrlCreateButton('Gui3', 60, 80, 80, 40)
$nButton3 = GUICtrlCreateButton('Gui4', 60, 140, 80, 40)
$hGui2 = GUICreate('Gui2', 200, 200, 250, -1)
GUISetIcon($sFile, 10)
$hGui3 = GUICreate('Gui3', 200, 200, 250, -1)
GUISetIcon($sFile, 15)
$hGui4 = GUICreate('Gui4', 200, 200, 250, -1)
GUISetIcon($sFile, 20)
GUISetState(@SW_SHOW, $hGui1)
While 1
$aMsg = GUIGetMsg(1)
Switch $aMsg[1]
Case $hGui1
Switch $aMsg[0]
Case $GUI_EVENT_CLOSE
Exit
Case $nButton1
GUISetState(@SW_DISABLE, $hGui1)
GUISetState(@SW_SHOW, $hGui2)
Case $nButton2
GUISetState(@SW_DISABLE, $hGui1)
GUISetState(@SW_SHOW, $hGui3)
Case $nButton3
GUISetState(@SW_DISABLE, $hGui1)
GUISetState(@SW_SHOW, $hGui4)
EndSwitch
Case $hGui2
Switch $aMsg[0]
Case $GUI_EVENT_CLOSE
GUISetState(@SW_ENABLE, $hGui1)
GUISetState(@SW_HIDE, $hGui2)
EndSwitch
Case $hGui3
Switch $aMsg[0]
Case $GUI_EVENT_CLOSE
GUISetState(@SW_ENABLE, $hGui1)
GUISetState(@SW_HIDE, $hGui3)
EndSwitch
Case $hGui4
Switch $aMsg[0]
Case $GUI_EVENT_CLOSE
GUISetState(@SW_ENABLE, $hGui1)
GUISetState(@SW_HIDE, $hGui4)
EndSwitch
EndSwitch
WEnd