如何检测和打印CrystalReportViewer控件中的当前明细？

When using Business Objects' CrystalReportViewer control, how can you detect and manually print the report the user has currently drilled into? You can print this automatically using the Print() method of the CrystalReportViewer, but I want to be able to do a manual printing of this report.When using Business Objects' CrystalReportViewe