BCGCBPRODLLEXPORT UINT BCGM_ON_GAUGE_CLICK |
The message is sent to the owner of Gauge when the user clicks a Gauge.
wParam | contains the control ID of the Gauge object. |
lParam | the 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. |