Dennis, thank your reply. As your said we did a lot of testing using dfferent index number , but no acturally value return. And in QTP help file for SwfTable -> GetCell Data only one example like this

< == Get Data from a Specified Cell in an 'Infragistics UltraWinGrid' Control

Sub GetCellData_Example1()
'The following example uses the GetCellData method with Infragistics UltraWinGrid control to return the data
'contained in the second row of the "Description" column within the second band level.
MyData = SwfWindow("Layouts").SwfTable("gridOne").GetCellData("0;1", "Description")
MsgBox MyData

End Sub

==>

Seems for multi-band grid no API provide by the Infragistics TestAdvantage,do your have any other information or comment on that?

Thanks.