How to check value(if it is null or not) in processFormRequest

if (pageContext.getParameter("ApplyBtn") != null){          OAViewObject voh = (OAViewObject)am.findViewObject("XxVO1");          try...

Creating Lookup and Lookup Values through API

DECLARE    err_code    VARCHAR2 (50);    err_msg     VARCHAR2 (1000);    ln_rowid    ROWID;    ln_rowid1 ...