Microsoft Visual Basic 6.0 component tools guide Microsoft visual basic 6.0 programmer's guide Microsoft Visual Basic 6.0 controls reference Microsoft Visual C++ 6.0 programmer's guide Microsoft visual foxpro 6.0 programmer's guide Microsoft Visual InterDev 6.0 programmer's guide Microsoft Visual J++6.0 programmer's guide Microsoft Visual Basic 6.0 language reference Microsoft visual basic 2013 step by step Microsoft Visual Basic 6.0 Professional step by step