Dafür gibt es _GUICtrlComboBox__GetCurSel
[autoit]#include <GuiComboBox.au3>
#include <GUIConstantsEx.au3>
$Debug_CB = False ; Check ClassName being passed to ComboBox/ComboBoxEx functions, set to True and use a handle to another control to see it work
[/autoit][autoit][/autoit][autoit]_Main()
[/autoit][autoit][/autoit][autoit]Func _Main()
Local $hCombo
; Create GUI
GUICreate("ComboBox Get Cur Sel", 400, 296)
$hCombo = GUICtrlCreateCombo("", 2, 2, 396, 296)
GUISetState()
; Add files
_GUICtrlComboBox_BeginUpdate($hCombo)
_GUICtrlComboBox_AddDir($hCombo, @WindowsDir & "\*.exe")
_GUICtrlComboBox_EndUpdate($hCombo)
Do
$msg = GUIGetMsg()
Switch $msg
Case $hCombo
MsgBox(4160, "Information", "Cur Sel: " & _GUICtrlComboBox_GetCurSel($hCombo))
EndSwitch
Until $msg = $GUI_EVENT_CLOSE
GUIDelete()
EndFunc ;==>_Main
Perfekt, das was ich gesucht habe. Danke dir 
