Where is SetOaNoCache defined?

Question

Attempting to disable BSTR caching:

SetOaNoCache();

VC++ compiler build output:

'SetOaNoCache': identifier not found

Don't want to use:

OANOCACHE=1

Question:

Where is SetOaNoCache defined - header file?

score 8 · Accepted Answer · answered Feb 16 '09 at 16:26

8

It is not defined in a header file, it is in OLEAUT32.dll. You can call it like this:

typedef int (*SETOANOCACHE)(void);

void DisableBSTRCache()
{
    HINSTANCE hLib = LoadLibrary("OLEAUT32.DLL");
    if (hLib != NULL)
    {
        SETOANOCACHE SetOaNoCache = (SETOANOCACHE)GetProcAddress(hLib, "SetOaNoCache");
        if (SetOaNoCache != NULL)
            SetOaNoCache();
        FreeLibrary(hLib);
    }
}

answered Feb 16 '09 at 16:26

Patrick Glandien

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+1: @sikx - thanks dude! I'll try it out :). Where can I find out more about this? How did you know it was in OLEAUT32.dll? – Aaron Feb 16 '09 at 16:29
2

2 minutes with google: http://www.tech-archive.net/Archive/VC/microsoft.public.vc.atl/2005-03/0184.html – Patrick Glandien Feb 16 '09 at 16:30
Should be declared as "void __cdecl SetOaNoCache(void)". See MSDN article: https://msdn.microsoft.com/en-us/library/windows/desktop/ms644360(v=vs.85).aspx – Giorgi Chakhidze Apr 28 '15 at 15:53

score 3 · Answer 2 · answered Feb 16 '09 at 16:28

It's not. From the Win32 API library shipped with C++ Builder:

Requirements

Windows XP: Requires Windows XP Service Pack 2 or later.

Windows 95/98: Not supported.

Header: Not supplied. Declare prototype as shown.

Library: Use oleaut32.lib.

The prototype as shown:

inline void TurnOffCache ()
{
// Function prototype.
extern "C" SetOaNoCache(); 
// Turn off BSTR caching.
SetOaNoCache();
}

Where is SetOaNoCache defined?

2 Answers2

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