From: Joseph Dempsey (joseph_r_dempseyYAHOO.COM)
Date: Fri Apr 11 2003 - 16:36:52 CDT

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BSTRs suck because they are have a length limit. If you use regular wchar's
you don't have to worry about. If defining a custom interface it is best to
avoid automation data types all together.

-----Original Message-----
From: Distributed COM-Based Code [mailto:DCOMDISCUSS.MICROSOFT.COM] On
Behalf Of Lewis Jones
Sent: Friday, April 11, 2003 5:24 PM
To: DCOMDISCUSS.MICROSOFT.COM

And if you are going to mess with w_char's, then you might as well go all
the way and define them as BSTR's:

HRESULT DoBar([in] BSTR bstrSomeStr);

Call like:
CString strMyString = "Foo";
BSTR bstrMyString = strMyString.AllocSysString(); hRes =
pMyObj->DoBar(bstrMyString); ::SysFreeString(bstrMyString); if
(SUCCEEDED(hRes)) {
        // Do whatever.
}

Just make sure you call SysFreeString to free up any created BSTRs as soon
as possible.(Either from CString's AllocSysString call, or ::SysAllocString,
or the like).
 
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