CString to const variant&
Hi,
i want to call a function that has a parameter of type const VARIANT&.
i want to pass a string as parameter.
i try to do like this
VARIANT Var;
Var.vt = VT_BSTR;
Var.pbVal = (unsigned char *) LPCTSTR("Testing string");
function(Var);
but i use watch window to watch Var variable and it shows {"" VT_BSTR}
so i try other method
Var.vt = VT_BSTR;
Var.bstrVal = (unsigned short*) LPCTSTR("Testing string");
the same thing happen, what have i did wrong ?
How to convert string value to VARIANT ?
thanks
[597 byte] By [
weiwei] at [2007-11-19 6:38:38]

# 1 Re: CString to const variant&
i want to call a function that has a parameter of type const VARIANT&. i want to pass a string as parameter.Note that variants require a BSTR: You can't simply copy an existing LPCTSTR, since BSTRs are always UNICODE and have an additional length field. You can reallocate an existing BSTR from a CString via SetSysString(), or create a new one with AllocSysString(). As for dealing with variants, I would suggest to use the handy class COleVariant (since you're using MFC anyway).