[Dev-C++] XP Manifest and Win32 controls

Hi all,

I'm just trying to use Win32 common controls in Dev-cpp with "Support
Windows XP themes" activated in project's options. Actually, I simply
use the Win32 application template, where I added following lines of
code, just after main window creation :

=09HWND button =3D CreateWindowEx(
=09=090,
=09=09"button", "Cancel",
=09=09WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
=09=09100, 200, 100, 20,
=09=09hwnd, (HMENU) IDOK,
=09=09hThisInstance,
=09=09NULL
=09);

Actually, that code works (i see push button) when XP styles are
desactivated. When I activate that option, the CreateWindowEx fails
with error "The class does not exist".

Sorry, but I'm new to win32 programming, and I have to maintain a old
app. If someone has a little idea of what can solve that issue, that
would be fine !
--
Thierry Pierron