BCGControlBar Pro for MFC
UINT BCGM_ON_GAUGE_SCROLL_FINISHED

The message is sent to the owner of Static Gauge (when the users clicks a Gauge.

Parameters
wParamcontains the control ID of the Gauge object.
lParamthe low-order word specifies the x-coordinate of the cursor. The high-order word specifies the y-coordinate of the cursor. The coordinates are the screen coordinates.
Returns
The return value is ignored.