.

[DllImport("winscard.dll", EntryPoint="SCardConnect", CharSet=CharSet.Auto)]

.

    [DllImport("WinScard.dll", EntryPoint = "SCardListReadersA", CharSet = CharSet.Ansi)]

.

[DllImport("winscard.dll", CharSet=CharSet.Auto)]

.

  [DllImport("winscard.dll", EntryPoint="SCardListReadersA", CharSet=CharSet.Ansi)]

.

  [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]

.

[DllImport("gdi32.dll", EntryPoint = "CopyEnhMetaFile", SetLastError = true, CharSet = CharSet.Auto)]

.

<DllImport("gdi32.dll", SetLastError:=True, CharSet:=CharSet.Ansi)> _

.

    [DllImport("gdi32.dll", EntryPoint = "CreateDC", CharSet = CharSet.Auto, SetLastError = true)]

.

   fdwStrikeOut, uint fdwCharSet, uint fdwOutputPrecision, uint

.

            [In] UInt32 fdwCharSet,

.

    ByVal fdwCharSet As Int32, ByVal fdwOutputPrecision As UInt32, _

.

      [DllImport("gdi32.dll", CharSet=CharSet.Auto)]

.

    private const byte DEFAULT_CHARSET = 1;

.

    private const byte SHIFTJIS_CHARSET = 128;

.

    private const byte JOHAB_CHARSET = 130;

.

    private const byte EASTEUROPE_CHARSET = 238;

.

    [DllImport("gdi32.dll", CharSet = CharSet.Auto)]

.

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

    public FontCharSet lfCharSet;

.

    public enum FontCharSet : byte

.

    ANSI_CHARSET = 0,

.

    DEFAULT_CHARSET = 1,

.

    SYMBOL_CHARSET = 2,

.

    SHIFTJIS_CHARSET = 128,

.

    HANGEUL_CHARSET = 129,

.

    HANGUL_CHARSET = 129,

.

    GB2312_CHARSET = 134,

.

    CHINESEBIG5_CHARSET = 136,

.

    OEM_CHARSET = 255,

.

    JOHAB_CHARSET = 130,

.

    HEBREW_CHARSET = 177,

.

    ARABIC_CHARSET = 178,

.

    GREEK_CHARSET = 161,

.

    TURKISH_CHARSET = 162,

.

    VIETNAMESE_CHARSET = 163,

.

    THAI_CHARSET = 222,

.

    EASTEUROPE_CHARSET = 238,

.

    RUSSIAN_CHARSET = 204,

.

    MAC_CHARSET = 77,

.

    BALTIC_CHARSET = 186,

.

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

    public byte tmCharSet;

.

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

    lf.lfCharSet = FontCharSet.DEFAULT_CHARSET;

.

        public enum FontLanguageCharSet

.

            ANSI_CHARSET = 0x00000000,

.

            DEFAULT_CHARSET = 0x00000001,

.

            SYMBOL_CHARSET = 0x00000002,

.

            MAC_CHARSET = 0x0000004D,

.

            SHIFTJIS_CHARSET = 0x00000080,

.

            HANGUL_CHARSET = 0x00000081,

.

            JOHAB_CHARSET = 0x00000082,

.

            GB2312_CHARSET = 0x00000086,

.

            CHINESEBIG5_CHARSET = 0x00000088,

.

            GREEK_CHARSET = 0x000000A1,

.

            TURKISH_CHARSET = 0x000000A2,

.

            VIETNAMESE_CHARSET = 0x000000A3,

.

            HEBREW_CHARSET = 0x000000B1,

.

            ARABIC_CHARSET = 0x000000B2,

.

            BALTIC_CHARSET = 0x000000BA,

.

            RUSSIAN_CHARSET = 0x000000CC,

.

            THAI_CHARSET = 0x000000DE,

.

            EASTEUROPE_CHARSET = 0x000000EE,

.

            OEM_CHARSET = 0x000000FF

.

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

            public Byte lfCharSet;

.

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

            public Byte tmCharSet;

.

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

            public Byte tmCharSet;

.

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]

.

                var logfont = new LOGFONT() { lfCharSet = (byte)FontLanguageCharSet.DEFAULT_CHARSET };

.

            // Fixed Pitch & ANSI_CHARSET

.

            List<string> mono = (from f in allFonts where ((f.LogFont.elfLogFont.lfPitchAndFamily & 0x3) == (int)GdiFonts.FontPitch.FIXED_PITCH) & (GdiFonts.FontLanguageCharSet)f.LogFont.elfLogFont.lfCharSet == GdiFonts.FontLanguageCharSet.ANSI_CHARSET select f.LogFont.elfFullName).ToList<string>();

.

            // Variable Pitch & ANSI_CHARSET

.

            List<string> variable = (from f in allFonts where ((f.LogFont.elfLogFont.lfPitchAndFamily & 0x3) == (int)GdiFonts.FontPitch.VARIABLE_PITCH) & (GdiFonts.FontLanguageCharSet)f.LogFont.elfLogFont.lfCharSet == GdiFonts.FontLanguageCharSet.ANSI_CHARSET select f.LogFont.elfFullName).ToList<string>();

.

    private const byte DEFAULT_CHARSET = 1;

.

    private const byte SHIFTJIS_CHARSET = 128;

.

    private const byte JOHAB_CHARSET = 130;

.

    private const byte EASTEUROPE_CHARSET = 238;

.

    [DllImport("gdi32.dll", CharSet = CharSet.Auto)]

.

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

    public FontCharSet lfCharSet;

.

    public enum FontCharSet : byte

.

    ANSI_CHARSET = 0,

.

    DEFAULT_CHARSET = 1,

.

    SYMBOL_CHARSET = 2,

.

    SHIFTJIS_CHARSET = 128,

.

    HANGEUL_CHARSET = 129,

.

    HANGUL_CHARSET = 129,

.

    GB2312_CHARSET = 134,

.

    CHINESEBIG5_CHARSET = 136,

.

    OEM_CHARSET = 255,

.

    JOHAB_CHARSET = 130,

.

    HEBREW_CHARSET = 177,

.

    ARABIC_CHARSET = 178,

.

    GREEK_CHARSET = 161,

.

    TURKISH_CHARSET = 162,

.

    VIETNAMESE_CHARSET = 163,

.

    THAI_CHARSET = 222,

.

    EASTEUROPE_CHARSET = 238,

.

    RUSSIAN_CHARSET = 204,

.

    MAC_CHARSET = 77,

.

    BALTIC_CHARSET = 186,

.

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

    public byte tmCharSet;

.

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

    lf.lfCharSet = FontCharSet.DEFAULT_CHARSET;

.

        public enum FontLanguageCharSet

.

            ANSI_CHARSET = 0x00000000,

.

            DEFAULT_CHARSET = 0x00000001,

.

            SYMBOL_CHARSET = 0x00000002,

.

            MAC_CHARSET = 0x0000004D,

.

            SHIFTJIS_CHARSET = 0x00000080,

.

            HANGUL_CHARSET = 0x00000081,

.

            JOHAB_CHARSET = 0x00000082,

.

            GB2312_CHARSET = 0x00000086,

.

            CHINESEBIG5_CHARSET = 0x00000088,

.

            GREEK_CHARSET = 0x000000A1,

.

            TURKISH_CHARSET = 0x000000A2,

.

            VIETNAMESE_CHARSET = 0x000000A3,

.

            HEBREW_CHARSET = 0x000000B1,

.

            ARABIC_CHARSET = 0x000000B2,

.

            BALTIC_CHARSET = 0x000000BA,

.

            RUSSIAN_CHARSET = 0x000000CC,

.

            THAI_CHARSET = 0x000000DE,

.

            EASTEUROPE_CHARSET = 0x000000EE,

.

            OEM_CHARSET = 0x000000FF

.

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

            public Byte lfCharSet;

.

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

            public Byte tmCharSet;

.

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

            public Byte tmCharSet;

.

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]

.

                var logfont = new LOGFONT() { lfCharSet = (byte)FontLanguageCharSet.DEFAULT_CHARSET };

.

            // Fixed Pitch & ANSI_CHARSET

.

            List<string> mono = (from f in allFonts where ((f.LogFont.elfLogFont.lfPitchAndFamily & 0x3) == (int)GdiFonts.FontPitch.FIXED_PITCH) & (GdiFonts.FontLanguageCharSet)f.LogFont.elfLogFont.lfCharSet == GdiFonts.FontLanguageCharSet.ANSI_CHARSET select f.LogFont.elfFullName).ToList<string>();

.

            // Variable Pitch & ANSI_CHARSET

.

            List<string> variable = (from f in allFonts where ((f.LogFont.elfLogFont.lfPitchAndFamily & 0x3) == (int)GdiFonts.FontPitch.VARIABLE_PITCH) & (GdiFonts.FontLanguageCharSet)f.LogFont.elfLogFont.lfCharSet == GdiFonts.FontLanguageCharSet.ANSI_CHARSET select f.LogFont.elfFullName).ToList<string>();

.

[DllImport("gdiplus.dll", CharSet=CharSet.Unicode)]

.

        [DllImport("gdiplus.dll", CharSet=CharSet.Unicode)]

.

    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]

.

Summary

The GetTextCharsetInfo API

.

static extern int GetTextCharsetInfo(IntPtr hdc, IntPtr lpSig, uint dwFlags);

.

Documentation

[GetTextCharsetInfo] on MSDN

.

If you need to treat unicode text, you'll need to set the CharSet option to Unicode or Auto (which is default on WindowsNT)

.

[DllImport("gdi32.dll", CharSet=CharSet.Unicode)]

.

If you need to treat unicode text, you'll need to set the CharSet option to Unicode or Auto (which is default on WindowsNT)

.

[DllImport("gdi32.dll", CharSet=CharSet.Unicode)]

.

[DllImport("gdi32.dll", CharSet = CharSet.Auto)]

.

//CharSet.auto automatically selects between these functions based on the OS version:

.

[DllImport("gdi32.dll", CharSet = CharSet.Unicode)]

.

[DllImport("gdi32.dll", CharSet = CharSet.Ansi)]

.

It's very important to use the same charset on the TEXTMETRIC structure and the extern function.

.

[DllImport("Gdi32.dll", CharSet=CharSet.Auto)]

.

[DllImport("Gdi32.dll", CharSet=CharSet.Auto)]

.

[DllImport("Gdi32.dll", CharSet=CharSet.Auto)]

.

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

   public byte tmCharSet;

.

[StructLayout(LayoutKind::Sequential, CharSet=CharSet::Unicode)]

.

   Byte tmCharSet;

.

[DllImport("Gdi32.dll", CharSet=CharSet::Unicode)]

.

    [DllImport("user32.dll",CharSet=CharSet.Auto)]

.

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]

.

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]

.

[DllImport("user32.dll", CharSet=CharSet.Unicode)]

.

[DllImport("gdi32.dll", CharSet = CharSet.Auto)]

.

   string lpString, int cbString); (Please see note for CharSet in tips)

.

[CharSet = CharSet.Auto] According to my experience this parameter should be used when using a LOGFONT structure and the CreateFontIndirect fuction, otherwise the selected font will not be displayed. All flags will be done (lfItalic, lfUnderline ...) but not the lfFaceName string.

.

    [DllImport("urlmon.dll", CharSet = CharSet.Unicode, ExactSpelling = true, SetLastError = false)]

.

    <DllImport("urlmon.dll", CharSet:=CharSet.Auto)> _

.

[DllImport("urlmon.dll", CharSet=CharSet.Auto, SetLastError=true)]

.

         CharSet = CharSet.Unicode, ExactSpelling = true,

.

[DllImport("urlmon.dll", CharSet=CharSet.Auto, SetLastError=true)]

.

[DllImport("urlmon.dll", CharSet=CharSet.Auto, PreserveSig=false)]

.

<DllImport("urlmon.dll", CharSet := CharSet.Auto, SetLastError := True)> _

.

[DllImport("urlmon.dll", CharSet=CharSet.Ansi)]

.

<DllImport("urlmon.dll", CharSet:=CharSet.Ansi)> _

.

[DllImport("DIFxAPI.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport("DIFxAPI.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport("DIFxAPI.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport("DIFxAPI.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

    [DllImport("DIFxAPI.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport("DIFxAPI.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport("DIFxAPI.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport("DIFxAPI.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport("Wlanapi.dll", SetLastError = true, CharSet = CharSet.Unicode)]

.

[DllImport("Wlanapi.dll", SetLastError = true, CharSet = CharSet.Unicode)]

.

[DllImport("Wlanapi.dll", SetLastError = true, CharSet = CharSet.Unicode)]

.

[DllImport("Wlanapi.dll",SetLastError = true,CharSet = CharSet.Unicode)]

.

[DllImport("Wlanapi.dll",SetLastError = true,CharSet = CharSet.Unicode)]

.

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)> _

.

      [DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]

.

      [DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]

.

      [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

      [DllImport("Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

      [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]

.

    [DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]

.

    [DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]

.

[DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Auto)]

.

[DllImport("Certadm.dll", CharSet=CharSet.Auto, SetLastError=true)]

.

    [DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Auto)]

.

    [DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Auto)]

.

     [DllImport ("advapi32.dll", EntryPoint = "OpenSCManagerW", ExactSpelling = true, CharSet = CharSet.Unicode, SetLastError = true)]

.

     [DllImport ("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]

.

     [DllImport ("advapi32.dll", EntryPoint = "QueryServiceStatus", CharSet = CharSet.Auto)]

.

[DllImport("advapi32", CharSet=CharSet.Auto, SetLastError=true)]

.

[DllImport("advapi32", CharSet = CharSet.Auto, SetLastError = true)]

.

       'The PtrToStringXXX call here needs to match the CharSet used on your

.

       'ConvertSidToStringSid DllImport.  The default is CharSet.Ansi.

.

    [DllImport("advapi32.dll", EntryPoint = "GetLengthSid", CharSet = CharSet.Auto)]

.

[DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Auto)]

.

<DllImport("Advapi32.dll", ExactSpelling:=False, SetLastError:=True, CharSet:=CharSet.Unicode)> _

.

  [DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Unicode)]

.

<DllImport("advapi32.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _

.

    <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto)> _

.

    <DllImport("advapi32.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _

.

        [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]

.

        [DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Unicode)]

.

[DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Auto)]

.

    <DllImport("advapi32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _

.

    [DllImport("advapi32.dll", EntryPoint = "CredDeleteW", CharSet = CharSet.Unicode)]

.

    [DllImport("advapi32.dll", EntryPoint = "CredDeleteW", CharSet = CharSet.Unicode)]

.

    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]

.

[DllImport("advapi32.dll", CharSet = CharSet.Unicode, SetLastError=true)]

.

[DllImport("advapi32.dll", EntryPoint="CredReadW", CharSet = CharSet.Unicode, SetLastError=true)]

.

    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]

.

        [DllImport("Advapi32.dll", EntryPoint = "CredReadW", CharSet = CharSet.Unicode, SetLastError = true)]

.

       [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]

.

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]

.

[DllImport("Advapi32.dll", SetLastError=true, EntryPoint="CredWriteW", CharSet=CharSet.Unicode)]

.

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]

.

[DllImport("Advapi32.dll", SetLastError=true, EntryPoint="CredWriteW", CharSet=CharSet.Unicode)]

.

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]

.

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]

.

[DllImport("advapi32.dll", CharSet=CharSet.Auto, SetLastError=true)]

.

[DllImport(@"advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Auto)]

.

     [DllImport("advapi32", CharSet = CharSet.Unicode, SetLastError = true), SuppressUnmanagedCodeSecurityAttribute]

.

     [DllImport("advapi32", CharSet = CharSet.Unicode, SetLastError = true), SuppressUnmanagedCodeSecurityAttribute]

.

[DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Auto)]

.

[DllImport(@"advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

[DllImport(@"Advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]

.

<DLLImport("advapi32.dll", CharSet := CharSet.Auto, SetLastError := True)>