The TTN_SHOW notification message notifies the owner window that a tooltip is about to be displayed. This notification message is sent in the form of a WM_NOTIFY message.
TTN_SHOW
idTT = (int) wParam;
pnmh = (NMHDR FAR *) lParam;
Parameters
idTT
Identifier of the tooltip control.
lpttt
Return Values
No return value.
Remarks
Address of an NMHDR structure.
See Also