Default parameters in COM

[abedford]

Hi,

I would like to add a default parameter to a COM function. I defined
it in the IDL file like this:
HRESULT GetName( [in] BSTR id1
, [in] BSTR id2
, [in, defaultvalue("False")] BOOL disableSignin
, [out, retval] BSTR** pName );

But when I try to implement this function in COM, I can't set the
default value because it is not the last parameter... and I have to
keep the return value as the last parameter (to stop from breaking
client's codes etc.).

Am I wrong in thinking it should be possible to set a default
parameter in a COM function? How do you get around having the return
value at the end of the list of parameters or is it only possible on a
void function?

Thanks.

 

[red floyd]

Hi,

I would like to add a default parameter to a COM function. I defined
it in the IDL file like this:
HRESULT GetName( [in] BSTR id1
, [in] BSTR id2
, [in, defaultvalue("False")] BOOL disableSignin
, [out, retval] BSTR** pName );

But when I try to implement this function in COM, I can't set the
default value because it is not the last parameter... and I have to
keep the return value as the last parameter (to stop from breaking
client's codes etc.).

Am I wrong in thinking it should be possible to set a default
parameter in a COM function? How do you get around having the return
value at the end of the list of parameters or is it only possible on a
void function?

Well, since IDL is not topical for this group, I would suggest you try a
newsgroup dedicated to your platform.

Please see FAQ 5.9 for a list of possible newsgroups.