A reference to a DataRow object representing the data row whose k ey is to be calculated.
Return Value
An object representing the group's key.
Remarks
The QueryGroupKeys event can also be used to provide custom grouping criteria.
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2