How to detect Pocket PC 2003

I use the following function in my code to detect between Pcoket PC 2000
and 2002:

BOOL IsPocketPC2002(void)
{
TCHAR szPlatform[36];
OSVERSIONINFO osVer;

GetVersionEx(&osVer);
if (osVer.dwMajorVersion==3)
if
(SystemParametersInfo(SPI_GETPLATFORMTYPE,sizeof(szPlatform),szPlatform,0)!=0)
if (lstrcmp(szPlatform,TEXT("PocketPC"))==0)
return TRUE;
return FALSE;
}

Will this also detect Pocket PC 2003? If not, how can I detect correctly
that I run on Pocket PC 2003?

I'm being told by some users that my Today plugin isnt transparent in
2003 anymore. The only thing I can think of is that I do different
things in my WM_ERASEBKGND and that I'm not doing the right thing for 2003.

Thanks in advance