Hi Neils: The code of the function is: boost::tuple<bool, HWND> Speech::CheckWindowExists(std::wstring WindowName, std::wstring WindowClass) { HWND TempWindow; LPCTSTR WndClass, WndName =NULL; if (WindowClass.length() >0 ) WndClass =WindowClass.c_str(); if (WindowName.length() >0) WndName =WindowName.c_str(); TempWindow =FindWindow(WndClass, WndName); if (TempWindow ==NULL) return boost::make_tuple(false, NULL); else return boost::make_tuple(true, TempWindow); } And the errors are: error C2440: 'initializing' : cannot convert from 'const int' to 'HWND__ *' tuple_basic.hpp 451 Speech error C2439: 'boost::tuples::cons<HT,TT>::head' : member could not be initialized tuple_basic.hpp 451 Hope this helps diagnose the problem. Cheers Sean. -----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Niels Dekker - address until 2010-10-10 Sent: 04 July 2010 15:00 To: boost-users@lists.boost.org Subject: Re: [Boost-users] [boost.tuple] issue On 2010-07-04-Sun 15:18, Sean Farrow wrote:

I've got a tuple defined as: Boost::tuple<bool, HWND>

And when I do: Boost::make_tuple(true, TempWindow);

I get the error C2440 cannot convert from int to hwnd__*

Anyone got any ideas? Visual c++ 2008, and boost 1.43.

I guess the type of your TempWindow might not be HWND...? Otherwise maybe you should post a code snippet to clarify what you're trying to compile! HTH, Niels -- Niels Dekker http://www.xs4all.nl/~nd/dekkerware Scientific programmer at LKEB, Leiden University Medical Center _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users