Search code examples
windowsdelphiactivexdelphi-7ole

Can Delphi 7 pass Int64 value through OLE Variant?

I know that in Delphi 5 it is impossible to write Int64 to Variant and OLEVariant and so, to use it in Type Library (TLB) file of COM Server.

Does anybody know or had experience with Delphi 7 regarding of usage int64 values in COM Server interfaces?

Solution

  • No restriction on Int64 in Delphi 7 variants: it is supported, in the standard way:

    There is indeed the OLE/COM compatible type definition

    varInt64    = $0014; { vt_i8          20 }

    in the System.pas unit, and all needed conversion in the Variants.pas unit.

    I confirm it was not supported in Delphi 5.