Error in oleauto.h

[Roberto Icaza]

Hi,
I am programming a small and simple Win32 DLL in Visual C++ 6.0 (SP 4)
with the following code:

extern "C" long __stdcall GetList(BSTR *ListHolder)
{
String MYSTRING = "one,two,three,four,five";

ListHolder = SysAllocString(MYSTRING.c_str());
return true;
}

In order to use SysAllocString, I have to include the standard header
file oleauto.h, which I did. However, when trying to build the DLL, I get
two errors from the same line in the header file:

Line:
EXTERN_C const IID IID_StdOle;

Errors:
error C2146: syntax error : missing ';' before identifier 'IID_StdOle'
fatal error C1004: unexpected end of file found

What is wrong? Why am I getting errors in a standard include file? Is
there any other file I should have included? I installed Service Pack 4
thinking there might be a bug, but its not that. I'm no C++ expert, but as
far as I know, its not my code, is it?

Any help very much appreciated,
Roberto Icaza

[Randy Charles Morin]

You have to include wtypes before oleauto.
Also, you have to dereference ListHolder.
The following compiles in VC6.

#include <string>
#include <wtypes.h>
#include <oleauto.h>

extern "C" long __stdcall GetList(BSTR *ListHolder)
{

std::wstring MYSTRING = L"one,two,three,four,five";

*ListHolder = ::SysAllocString(MYSTRING.c_str());
return true;
}

--
Randy Charles Morin
http://www.kbcafe.com/randycharlesmorin

"Roberto Icaza" <ric...@ans.edu.ni> wrote in message
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