drilldown in a datagrid

Visual Studio138
Sorry for the multple post, but since I didn't get an answer the first time,

it occurred to me that I night have posted in the wrong group.



I have a datagrid with a dataset as its datasource. Its datamember is a

table that has 3 datarelations defined in the dataset. I would like to

capture the click event on the plus sign to avoid allowing the user to select

which datarelation to use to view child records. Can I do this without

subclassing the datagrid? If not, what is the best way to grab onto the

plus-sign click (since datagrid.hittestinfo doesn't distinguish the plus-sign

click from any other rowheader click)?



Thanks for the help.



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Pat


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