Passing parameters from one OAF page to another OAF Page

//In  processFormRequest()
HashMap xxhashMap = new HashMap(1);
xxhashMap .put("ParamName1", "Value1");

oapagecontext.setForwardURL("MY_FUNCTION", (byte)0, null, xxhashMap , true, "N", (byte)0);

OR

oapagecontext.setForwardURL("OA.jsp?page=/xxelng/oracle/apps/per/hiring/webui/XXConfermationPG",
                                      null,
                                      OAWebBeanConstants.KEEP_MENU_CONTEXT,
                                      null, xxhashMap , true,
                                      OAWebBeanConstants.ADD_BREAD_CRUMB_NO,
                                      OAWebBeanConstants.IGNORE_MESSAGES);

You can then retrieve this parameter in processRequest() via:
oapagecontext.getParameter("ParamName1");