NM_LDOWN (toolbar) notification code
Notifies a toolbar's parent window that the left mouse button has been pressed. This notification code is sent in the form of a WM_NOTIFY message.
Pointer to an NMMOUSE structure that contains information about this notification code. If the mouse was clicked on a toolbar item, the dwItemSpec member contains the item identifier and the dwItemData member contains the item data. If the mouse was clicked on a separator or white space in the toolbar, the dwItemSpec member will contain -1.
Returns FALSE to allow the toolbar control to perform default processing of the event, or TRUE to prevent the control from processing the event.
This notification is sent after the TBN_DROPDOWN notification code has been sent.
Minimum supported client
|Windows Vista [desktop apps only]|
Minimum supported server
|Windows Server 2003 [desktop apps only]|