| BCGCBPRODLLEXPORT UINT BCGM_ON_CHART_AFTER_DRAW | 
The framework sends the BCGM_ON_CHART_AFTER_DRAW registered message to an owner of chart visual object when the drawing has been completed.
| wParam | HIWORD - drawing flags (BCGP_DRAW_STATIC or BCGP_DRAW_DYNAMIC). LOWORD - ID of chart visual object. | 
| lParam | a pointer to a graphics manager (CBCGPGraphicsManager). | 
You can process this message to implement custom drawing. It's recommended to process this message only when you receive BCGP_DRAW_STATIC flag.