If the CWnd object owns a list box with the LBS_WANTKEYBOARDINPUT style, the list box will send the WM_VKEYTOITEM message in response to a WM_KEYDOWN message.
Specifies the action that the application performed in response to the message. A return value of –2 indicates that the application handled all aspects of selecting the item and requires no further action by the list box. A return value of –1 indicates that the list box should perform the default action in response to the keystroke. A return value of 0 or greater specifies the zero-based index of an item in the list box and indicates that the list box should perform the default action for the keystroke on the given item.
This member function is called by the framework only for list boxes that have the LBS_HASSTRINGS style.
This member function is called by the framework to allow your application to handle a Windows message. The parameters passed to your function reflect the parameters received by the framework when the message was received. If you call the base-class implementation of this function, that implementation will use the parameters originally passed with the message and not the parameters you supply to the function.