Obtain the detailed description of the current Windows operating system version.

Obtain the detailed description of the current Windows operating system version.
Currently, Windows 2003 is supported.

Cstring getosdesc (void)
{
Cstring sosinfo, stmp;
Osversioninfoex osvi;
Bool bosversioninfoex;

Sosinfo = "N/";

// Try calling getversionex using the osversioninfoex structure.
// If that fails, try using the osversioninfo structure.
Zeromemory (& osvi, sizeof (osversioninfoex ));
Osvi. dwosversioninfosize = sizeof (osversioninfoex );

If (! (Bosversioninfoex = getversionex (osversioninfo *) & osvi )))
{
Osvi. dwosversioninfosize = sizeof (osversioninfo );
If (! Getversionex (osversioninfo *) & osvi ))
Return sosinfo;
}

Switch (osvi. dwplatformid)
{
// Test for the Windows NT product family.
Case ver_platform_win32_nt:
// Test for the specific product family.
If (osvi. dwmajorversion = 5 & osvi. dwminorversion = 2)
Sosinfo = "Microsoft Windows Server 2003 Family ";

If (osvi. dwmajorversion = 5 & osvi. dwminorversion = 1)
Sosinfo = "Microsoft Windows XP ";

If (osvi. dwmajorversion = 5 & osvi. dwminorversion = 0)
Sosinfo = "Microsoft Windows 2000 ";

If (osvi. dwmajorversion <= 4)
Sosinfo = "Microsoft Windows NT ";

// Test for specific product on Windows NT 4.0 SP6 and later.
If (bosversioninfoex)
{
// Test for the workstation type.
If (osvi. wproducttype = ver_nt_workstation)
{
If (osvi. dwmajorversion = 4)
Sosinfo + = "Workstation 4.0 ";
Else if (osvi. wsuitemask & ver_suite_personal)
Sosinfo + = "Home Edition ";
Else
Sosinfo + = "professional ";
}
// Test for the server type.
Else if (osvi. wproducttype = ver_nt_server)
{
If (osvi. dwmajorversion = 5 & osvi. dwminorversion = 2)
{
If (osvi. wsuitemask & ver_suite_datacenter)
Sosinfo + = "datacenter edition ";
Else if (osvi. wsuitemask & ver_suite_enterprise)
Sosinfo + = "Enterprise Edition ";
Else if (osvi. wsuitemask = ver_suite_blade)
Sosinfo + = "web edition ";
Else
Sosinfo + = "Standard Edition ";
}
Else if (osvi. dwmajorversion = 5 & osvi. dwminorversion = 0)
{
If (osvi. wsuitemask & ver_suite_datacenter)
Sosinfo + = "datacenter server ";
Else if (osvi. wsuitemask & ver_suite_enterprise)
Sosinfo + = "Advanced Server ";
Else
Sosinfo + = "server ";
}
Else // Windows NT 4.0
{
If (osvi. wsuitemask & ver_suite_enterprise)
Sosinfo + = "Server 4.0, Enterprise Edition ";
Else
Sosinfo + = "Server 4.0 ";
}
}
}
Else // test for specific product on Windows NT 4.0 SP5 and earlier
{
Hkey;
Char szproducttype [80];
DWORD dwbuflen = 80;
Long LRET;

Stmp = "system // CurrentControlSet // control // productoptions ";
LRET = regopenkeyex (HKEY_LOCAL_MACHINE, stmp,
0, key_query_value, & hkey );
If (LRET! = Error_success)
Return sosinfo;

Stmp = "producttype ";
LRET = regqueryvalueex (hkey, stmp, null, null, (lpbyte) szproducttype, & dwbuflen );
If (LRET! = Error_success) | (dwbuflen> 80 ))
Return sosinfo;

Regclosekey (hkey );

Stmp = "winnt ";
Sosinfo + = "workstation ";
Stmp = "lanmannt ";
If (stmp = szproducttype)
Sosinfo + = "server ";
Stmp = "servernt ";
If (stmp = szproducttype)
Sosinfo + = "Advanced Server ";

Stmp. Format (L "% d. % d", osvi. dwmajorversion, osvi. dwminorversion );
Sosinfo + = stmp;
}

// Display Service Pack (if any) and build number.
Stmp = "Service Pack 6 ";
If (osvi. dwmajorversion = 4 & (stmp = osvi. szcsdversion ))
{
Hkey;
Long LRET;

// Test for SP6 versus SP6a.
Stmp = "software // Microsoft // Windows NT // CurrentVersion // hotfix // q246009 ";
LRET = regopenkeyex (HKEY_LOCAL_MACHINE, stmp,
0, key_query_value, & hkey );
If (LRET = error_success)
{
Stmp. Format (L "Service Pack 6a (build % d)/n", osvi. dwbuildnumber & 0 xFFFF );
Sosinfo + = stmp;
}
Else // Windows NT 4.0 prior to SP6a
{
Stmp. Format (L "% s (build % d)/n", osvi. szcsdversion, osvi. dwbuildnumber & 0 xFFFF );
Sosinfo + = stmp;
}

Regclosekey (hkey );
}
Else // Windows NT 3.51 and earlier or Windows 2000 and later
{
Stmp. Format (L "% s (build % d)/n", osvi. szcsdversion, osvi. dwbuildnumber & 0 xFFFF );
Sosinfo + = stmp;
}
Break;

// Test for the Windows 95 product family.
Case ver_platform_win32_windows:
If (osvi. dwmajorversion = 4 & osvi. dwminorversion = 0)
{
Sosinfo = "Microsoft Windows 95 ";
If (osvi. szcsdversion [1] = 'C' | osvi. szcsdversion [1] = 'B ')
Sosinfo + = "osr2 ";
}

If (osvi. dwmajorversion = 4 & osvi. dwminorversion = 10)
{
Sosinfo = "Microsoft Windows 98 ";
If (osvi. szcsdversion [1] = 'A ')
Sosinfo + = "se ";
}

If (osvi. dwmajorversion = 4 & osvi. dwminorversion = 90)
{
Sosinfo = "Microsoft Windows Millennium Edition ";
}
Break;

Case ver_platform_win32s:
Sosinfo = "Microsoft win32s ";
Break;
}

Return sosinfo;
}