I make a "datarelation" into my two tables. It is working! But my problem was, I want to have a navigation toolbars(movfirst, movnext,.....) wherein the "parenttable" was bind to the textbox and the "childtable" was bind to datagrid. How can I do that..

Part of code that has an error:

txtFirstname.DataBindings.Add("Text", m_oTest.OleDataSet.Relations("sCombine").ParentTable, "Firstname")

txtLastname.DataBindings.Add("Text", m_oTest.OleDataSet.Relations("sCombine").ChildTable, "Lastname")

dgmain.DataSource = m_oTest.OleDataSet.Relations("sCombine").ChildKeyConstraint.RelatedTable <<<<<<<>>>>>>>*****