Re: SetWindowTheme() / win2000

From:

"Doug Harrison [MVP]" <dsh@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Wed, 03 Oct 2007 23:38:21 -0500

Message-ID:

<n5r8g3115kk8hfq2visfod418k83jv9aml@4ax.com>

On Tue, 2 Oct 2007 22:10:12 -0500, "DR" <dr0134@gmail.com> wrote:

The apps calls the SetWindowTheme() function. To let the app work on
Win2000, I use /DELAYLOAD:Uxtheme.dll and the following code:

#define SkipOnError(x) __try { x; } __except(EXCEPTION_CONTINUE_EXECUTION)
{ ; };

SkipOnError(SetWindowTheme(...));

I wonder if it is correct. I cannot test on Win2000.

In my other reply, I explained how to deal with delayload exceptions. To
deal with the theme issue, I've simply tested the OS version. Here's the
code I used for that:

bool
UserEx::IsAppThemed()
{
   return OsVersion::AtLeastXP() && ::IsAppThemed();
}

bool
OsVersion::AtLeastXP()
{
   OSVERSIONINFO vi;
   vi.dwOSVersionInfoSize = sizeof(vi);
   ::GetVersionEx(&vi);
   return vi.dwPlatformId == VER_PLATFORM_WIN32_NT
         && (vi.dwMajorVersion > 5 ||
               (vi.dwMajorVersion == 5 && vi.dwMinorVersion >= 1));
}

Then my theme-sensitive code would look like this:

if (UserEx::IsAppThemed())
{
   // Use delay-loaded theme functions
}
else
{
   // Use regular Windows API
}

--
Doug Harrison
Visual C++ MVP