Re: Passing array of strings

"Alexander Nickolov" <>
Wed, 2 May 2007 10:38:47 -0700
Correction - safe array of BSTR is not compatible with scripting
languages like I erroneously stated. For VBScript you need a
safe array of VARIANT and each VARIANT within it containing
a BSTR. JScript has even more complicated arrays - IIRC it's an
object (IDispatch) with an indexed value property that returns
each element in the array given a string index ("1", "2", etc).

Alexander Nickolov
Microsoft MVP [VC], MCSD

"Alexander Nickolov" <> wrote in message

If you care about Automation compatibility (VB6 compatibility
is a goal for example, or scripting languages) then you should use
safe array of BSTR. Otherwise you can use a conformant array:

HRESULT passStrings([in] long sz, [in, size_is(sz)] BSTR* data);
HRESULT getStrings([out, ref] long *sz, [out, size_is(,*sz)] BSTR** data);

You can also use LPSTR and LPWSTR in place of BSTR for the
string type (e.g. C-style ANSI and UNICODE strings). Don't use
char* and wchar_t* explicitly (you can, but you must also specify
the [string] attribute).

Remember to make sure your interface does not derive from
IDispatch and that you do not specify the [oleautomation] attribute
if you use conformant arrays.

Alexander Nickolov
Microsoft MVP [VC], MCSD

"Rohit Kumar" <> wrote in message

I want to pass an array of strings to my interface method. Which datatypes
should i use to accomplish it? I didnt find any decent articles on the
Can anyone plz help me out with a code snippet?? like how should be my
definition at the server and how to prepare and pass an array of strings
the server and subsequently use it at the server.

Thanks in Advance!

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