[InfoPathEventHandler(MatchPath="mainOpen", EventType=InfoPathEventType.OnClick)]

public void mainOpen_OnClick(DocActionEvent e)

        IXMLDOMDocument3 wsDOM = (IXMLDOMDocument3)thisXDocument.DataObjects["queryReqs"].DOM;

        wsDOM.setProperty("SelectionNamespaces", "xmlns:dfs=\"http://schemas.microsoft.com/office/infopath/2003/dataFormSolution\"" + " xmlns:tns=\"http://tempuri.org/\"" + " xmlns:ns2=\"http://localhost/WebSite/\"");

        wsDOM.selectSingleNode("/dfs:myFields/dfs:queryFields/tns:queryReqs/tns:reqID").text = thisXDocument.DOM.selectSingleNode("/dfs:myFields/dfs:dataFields/ns2:getReqsResponse/ns2:getReqsResult/Reqs/_x005B_reqID_x005D_/reqID").text;

        thisXDocument.DataObjects["queryReqs"].Query();

        thisXDocument.View.SwitchView("detail");