Code to approve bom for product in Ax 2012.

 void God_setBOMActive(BOMId bomid,str 20 approver1)  
 {  
   BOMVersion BOMVersion1;  
   BOMApprove bomApprove = new BOMApprove();  
   RecId approver = HcmWorker::findByPersonnelNumber(approver1).RecId;  
   boolean ret=true;  
   try  
   {  
     select forUpdate BOMVersion1 where BOMVersion1.BOMId==bomid;  
     BOMVersion1.selectForUpdate();  
     BOMVersion1.Approved = true;  
     BOMVersion1.Active = true;  
     BOMVersion1.Approver = approver;  
     ttsBegin;  
     BOMVersion1.write();  
     ttsCommit;  
     bomApprove.init();  
     bomApprove.parmApprover(approver);  
     bomApprove.parmBOMId(bomid);  
     bomApprove.run();  
   }  
   catch  
   {  
     info(strFmt("(%1) approval failed.", bomid));  
   }  
 }