# GetCtrlIndex

int GetCtrlIndex (int panelHandle, int controlID, int *itemIndex);

## Purpose

Returns the zero-based index of the currently selected item in a list box, ring, or tree control.

To obtain the value of the currently selected item, call GetCtrlVal.

## Parameters

Input
Name | Type | Description
panelHandle | integer | Specifier for a particular panel that is currently in memory. You obtain this handle from LoadPanel, NewPanel, or DuplicatePanel.
controlID | integer | The defined constant, located in the .uir header file, that you assigned to the control in the User Interface Editor, or the ID returned by NewCtrl or DuplicateCtrl.
Output
Name | Type | Description
itemIndex | integer | The zero-based current index of the currently selected item. —1 if the list control has no items.

## Return Value

Name | Type | Description
status | integer | Return value indicating whether the function was successful. A negative number indicates that an error occurred.
Code | Error Message String
xx | Success