LBN_DBLCLK
The LBN_DBLCLK notification message is sent when the user double-clicks a string in a list box. The parent window of the list box receives this notification message through a WM_COMMAND message.
wParam
Specifies the identifier of the list box.
lParam
Specifies the handle of the list box in the low-order word, and specifies the LBN_DBLCLK notification message in the high-order word.
Only a list box that has LBS_NOTIFY style will send this notification message.