Index [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [Z] ValidateAndExchange 2nd 3rd 4th validation      ATL Server, handling input      CDialogImpl VALIDATION_E_FAIL VALIDATION_E_INVALIDPARAM VALIDATION_E_LENGTHMAX VALIDATION_E_LENGTHMIN VALIDATION_E_PARAMNOTFOUND VALIDATION_S_EMPTY 2nd VALIDATION_S_OK ValidationErrors VarBstrCmp VARIANT      SAFEARRAY VB subscript operators Visual Basic 6.0, COM enumeration and      VB subscript operators Visual Basic, NULL BSTR vptr-bloat VS, support for web applications and services