Board index » cppbuilder » Why BSTR but not WideString?

2003-06-29 11:30:26 AM
cppbuilder20
I am learning to write COM object and want to create property of String
type, and of course there is no such an AnsiString or WideString in COM,so i
create property of BSTR and think that when importing my COM dll, cbuilder
will automatically create a wrapper class and convert the BSTR type to
WideString. But it didn't.
However,i do find some WideString property in the ActiveX Control i have
ever imported and used, eg. Windows Media Player 1.0 control. In the wrapper
class of it ,all the string property are of type WideString rather than
BSTR. So i wonder that how it made it?
Thanks in advance.
Regards,
Booker
 

And if i import the same COM dll to delphi,all BSTR are converted into
WideString, Why BCB do not.
"booker" < XXXX@XXXXX.COM >дÈëÓʼþ

"booker" < XXXX@XXXXX.COM >wrote in message
wrapper class that includes a __property for the value, but the data type
will remain BSTR. It will not be converted automatically. Nor should it
be.
been using BCB for 5 years now and have never seen it do what you are
claiming.
does the generated wrapper class look like exactly?
Gambit
 

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