utils.cpp

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        wxZeroMemory(info);

        s_ver = wxWINDOWS;
        info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
        if ( ::GetVersionEx(&info) )
        {
            s_major = info.dwMajorVersion;
            s_minor = info.dwMinorVersion;

#ifdef __SMARTPHONE__
            s_ver = wxWINDOWS_SMARTPHONE;
#elif defined(__POCKETPC__)
            s_ver = wxWINDOWS_POCKETPC;
#else
            switch ( info.dwPlatformId )
            {
                case VER_PLATFORM_WIN32s:
                    s_ver = wxWIN32S;
                    break;

                case VER_PLATFORM_WIN32_WINDOWS:
                    s_ver = wxWIN95;
                    break;

                case VER_PLATFORM_WIN32_NT:
                    s_ver = wxWINDOWS_NT;
                    break;
#ifdef __WXWINCE__
                case VER_PLATFORM_WIN32_CE:
                    s_ver = wxWINDOWS_CE;
#endif
            }
#endif
        }
    }

    static wxToolkitInfo info;
    info.versionMajor = s_major;
    info.versionMinor = s_minor;
    info.os = s_ver;
    info.name = _T("wxBase");
    return info;
}

wxWinVersion wxGetWinVersion()
{
    int verMaj,
        verMin;
    switch ( wxGetOsVersion(&verMaj, &verMin) )
    {
        case wxWIN95:
            if ( verMaj == 4 )
            {
                switch ( verMin )
                {
                    case 0:
                        return wxWinVersion_95;

                    case 10:
                        return wxWinVersion_98;

                    case 90:
                        return wxWinVersion_ME;
                }
            }
            break;

        case wxWINDOWS_NT:
            switch ( verMaj )
            {
                case 3:
                    return wxWinVersion_NT3;

                case 4:
                    return wxWinVersion_NT4;

                case 5:
                    switch ( verMin )
                    {
                        case 0:
                            return wxWinVersion_2000;

                        case 1:
                            return wxWinVersion_XP;

                        case 2:
                            return wxWinVersion_2003;
                    }
                    break;

                case 6:
                    return wxWinVersion_NT6;
            }
            break;

    }

    return wxWinVersion_Unknown;
}

// ----------------------------------------------------------------------------
// sleep functions
// ----------------------------------------------------------------------------

void wxMilliSleep(unsigned long milliseconds)
{
    ::Sleep(milliseconds);
}

void wxMicroSleep(unsigned long microseconds)
{
    wxMilliSleep(microseconds/1000);
}

void wxSleep(int nSecs)
{
    wxMilliSleep(1000*nSecs);
}

// ----------------------------------------------------------------------------
// font encoding <-> Win32 codepage conversion functions
// ----------------------------------------------------------------------------

extern WXDLLIMPEXP_BASE long wxEncodingToCharset(wxFontEncoding encoding)
{
    switch ( encoding )
    {
        // although this function is supposed to return an exact match, do do
        // some mappings here for the most common case of "standard" encoding
        case wxFONTENCODING_SYSTEM:
            return DEFAULT_CHARSET;

        case wxFONTENCODING_ISO8859_1:
        case wxFONTENCODING_ISO8859_15:
        case wxFONTENCODING_CP1252:
            return ANSI_CHARSET;

#if !defined(__WXMICROWIN__)
        // The following four fonts are multi-byte charsets
        case wxFONTENCODING_CP932:
            return SHIFTJIS_CHARSET;

        case wxFONTENCODING_CP936:
            return GB2312_CHARSET;

#ifndef __WXWINCE__
        case wxFONTENCODING_CP949:
            return HANGUL_CHARSET;
#endif

        case wxFONTENCODING_CP950:
            return CHINESEBIG5_CHARSET;

        // The rest are single byte encodings
        case wxFONTENCODING_CP1250:
            return EASTEUROPE_CHARSET;

        case wxFONTENCODING_CP1251:
            return RUSSIAN_CHARSET;

        case wxFONTENCODING_CP1253:
            return GREEK_CHARSET;

        case wxFONTENCODING_CP1254:
            return TURKISH_CHARSET;

        case wxFONTENCODING_CP1255:
            return HEBREW_CHARSET;

        case wxFONTENCODING_CP1256:
            return ARABIC_CHARSET;

        case wxFONTENCODING_CP1257:
            return BALTIC_CHARSET;

        case wxFONTENCODING_CP874:
            return THAI_CHARSET;
#endif // !__WXMICROWIN__

        case wxFONTENCODING_CP437:
            return OEM_CHARSET;

        default:
            // no way to translate this encoding into a Windows charset
            return -1;
    }
}

// we have 2 versions of wxCharsetToCodepage(): the old one which directly
// looks up the vlaues in the registry and the new one which is more
// politically correct and has more chances to work on other Windows versions
// as well but the old version is still needed for !wxUSE_FONTMAP case
#if wxUSE_FONTMAP

#include "wx/fontmap.h"

extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding)
{
    // There don't seem to be symbolic names for
    // these under Windows so I just copied the
    // values from MSDN.

    unsigned int ret;

    switch (encoding)
    {
        case wxFONTENCODING_ISO8859_1:      ret = 28591; break;
        case wxFONTENCODING_ISO8859_2:      ret = 28592; break;
        case wxFONTENCODING_ISO8859_3:      ret = 28593; break;
        case wxFONTENCODING_ISO8859_4:      ret = 28594; break;
        case wxFONTENCODING_ISO8859_5:      ret = 28595; break;
        case wxFONTENCODING_ISO8859_6:      ret = 28596; break;
        case wxFONTENCODING_ISO8859_7:      ret = 28597; break;
        case wxFONTENCODING_ISO8859_8:      ret = 28598; break;
        case wxFONTENCODING_ISO8859_9:      ret = 28599; break;
        case wxFONTENCODING_ISO8859_10:     ret = 28600; break;
        case wxFONTENCODING_ISO8859_11:     ret = 28601; break;
        // case wxFONTENCODING_ISO8859_12,      // doesn't exist currently, but put it
        case wxFONTENCODING_ISO8859_13:     ret = 28603; break;
        case wxFONTENCODING_ISO8859_14:     ret = 28604; break;
        case wxFONTENCODING_ISO8859_15:     ret = 28605; break;
        case wxFONTENCODING_KOI8:           ret = 20866; break;
        case wxFONTENCODING_KOI8_U:         ret = 21866; break;
        case wxFONTENCODING_CP437:          ret = 437; break;
        case wxFONTENCODING_CP850:          ret = 850; break;
        case wxFONTENCODING_CP852:          ret = 852; break;
        case wxFONTENCODING_CP855:          ret = 855; break;
        case wxFONTENCODING_CP866:          ret = 866; break;
        case wxFONTENCODING_CP874:          ret = 874; break;
        case wxFONTENCODING_CP932:          ret = 932; break;
        case wxFONTENCODING_CP936:          ret = 936; break;
        case wxFONTENCODING_CP949:          ret = 949; break;
        case wxFONTENCODING_CP950:          ret = 950; break;
        case wxFONTENCODING_CP1250:         ret = 1250; break;
        case wxFONTENCODING_CP1251:         ret = 1251; break;
        case wxFONTENCODING_CP1252:         ret = 1252; break;
        case wxFONTENCODING_CP1253:         ret = 1253; break;
        case wxFONTENCODING_CP1254:         ret = 1254; break;
        case wxFONTENCODING_CP1255:         ret = 1255; break;
        case wxFONTENCODING_CP1256:         ret = 1256; break;
        case wxFONTENCODING_CP1257:         ret = 1257; break;
        case wxFONTENCODING_EUC_JP:         ret = 20932; break;
        case wxFONTENCODING_MACROMAN:       ret = 10000; break;
        case wxFONTENCODING_MACJAPANESE:    ret = 10001; break;
        case wxFONTENCODING_MACCHINESETRAD: ret = 10002; break;
        case wxFONTENCODING_MACKOREAN:      ret = 10003; break;
        case wxFONTENCODING_MACARABIC:      ret = 10004; break;
        case wxFONTENCODING_MACHEBREW:      ret = 10005; break;
        case wxFONTENCODING_MACGREEK:       ret = 10006; break;
        case wxFONTENCODING_MACCYRILLIC:    ret = 10007; break;
        case wxFONTENCODING_MACTHAI:        ret = 10021; break;
        case wxFONTENCODING_MACCHINESESIMP: ret = 10008; break;
        case wxFONTENCODING_MACCENTRALEUR:  ret = 10029; break;
        case wxFONTENCODING_MACCROATIAN:    ret = 10082; break;
        case wxFONTENCODING_MACICELANDIC:   ret = 10079; break;
        case wxFONTENCODING_MACROMANIAN:    ret = 10009; break;
        case wxFONTENCODING_UTF7:           ret = 65000; break;
        case wxFONTENCODING_UTF8:           ret = 65001; break;
        default:                            return -1;
    }

    if (::IsValidCodePage(ret) == 0)
        return -1;

    CPINFO info;
    if (::GetCPInfo(ret, &info) == 0)
        return -1;

    return (long) ret;
}

extern long wxCharsetToCodepage(const wxChar *name)
{
    // first get the font encoding for this charset
    if ( !name )
        return -1;

    wxFontEncoding enc = wxFontMapperBase::Get()->CharsetToEncoding(name, false);
    if ( enc == wxFONTENCODING_SYSTEM )
        return -1;

    // the use the helper function
    return wxEncodingToCodepage(enc);
}

#else // !wxUSE_FONTMAP

#include "wx/msw/registry.h"

// this should work if Internet Exploiter is installed
extern long wxCharsetToCodepage(const wxChar *name)
{
    if (!name)
        return GetACP();

    long CP = -1;

    wxString path(wxT("MIME\\Database\\Charset\\"));
    wxString cn(name);

    // follow the alias loop
    for ( ;; )
    {
        wxRegKey key(wxRegKey::HKCR, path + cn);

        if (!key.Exists())
            break;

        // two cases: either there's an AliasForCharset string,
        // or there are Codepage and InternetEncoding dwords.
        // The InternetEncoding gives us the actual encoding,
        // the Codepage just says which Windows character set to
        // use when displaying the data.
        if (key.HasValue(wxT("InternetEncoding")) &&
            key.QueryValue(wxT("InternetEncoding"), &CP))
            break;

        // no encoding, see if it's an alias
        if (!key.HasValue(wxT("AliasForCharset")) ||
            !key.QueryValue(wxT("AliasForCharset"), cn))
            break;
    }

    return CP;
}

#endif // wxUSE_FONTMAP/!wxUSE_FONTMAP

/*
  Creates a hidden window with supplied window proc registering the class for
  it if necesssary (i.e. the first time only). Caller is responsible for
  destroying the window and unregistering the class (note that this must be
  done because wxWidgets may be used as a DLL and so may be loaded/unloaded
  multiple times into/from the same process so we cna't rely on automatic
  Windows class unregistration).

  pclassname is a pointer to a caller stored classname, which must initially be
  NULL. classname is the desired wndclass classname. If function successfully
  registers the class, pclassname will be set to classname.
 */
extern "C" WXDLLIMPEXP_BASE HWND
wxCreateHiddenWindow(LPCTSTR *pclassname, LPCTSTR classname, WNDPROC wndproc)
{
    wxCHECK_MSG( classname && pclassname && wndproc, NULL,
                    _T("NULL parameter in wxCreateHiddenWindow") );

    // register the class fi we need to first
    if ( *pclassname == NULL )
    {
        WNDCLASS wndclass;
        wxZeroMemory(wndclass);

        wndclass.lpfnWndProc   = wndproc;
        wndclass.hInstance     = wxGetInstance();
        wndclass.lpszClassName = classname;

        if ( !::RegisterClass(&wndclass) )
        {
            wxLogLastError(wxT("RegisterClass() in wxCreateHiddenWindow"));

            return NULL;
        }

        *pclassname = classname;
    }

    // next create the window
    HWND hwnd = ::CreateWindow
                  (
                    *pclassname,
                    NULL,
                    0, 0, 0, 0,
                    0,
                    (HWND) NULL,
                    (HMENU)NULL,
                    wxGetInstance(),
                    (LPVOID) NULL
                  );

    if ( !hwnd )
    {
        wxLogLastError(wxT("CreateWindow() in wxCreateHiddenWindow"));
    }

    return hwnd;
}