-// send a message to the tooltip control
-inline LRESULT SendTooltipMessage(WXHWND hwnd,
- UINT msg,
- WPARAM wParam,
- void *lParam)
+// send a message to the tooltip control if it exists
+//
+// NB: wParam is always 0 for the TTM_XXX messages we use
+static inline LRESULT SendTooltipMessage(WXHWND hwnd, UINT msg, void *lParam)