C# Signature:

[DllImport("gdi32.dll")]
static extern IntPtr CreateFont(int nHeight, int nWidth, int nEscapement,
   int nOrientation, int fnWeight, uint fdwItalic, uint fdwUnderline, uint
   fdwStrikeOut, uint fdwCharSet, uint fdwOutputPrecision, uint
   fdwClipPrecision, uint fdwQuality, uint fdwPitchAndFamily, string lpszFace);

C# Signature:

[DllImport("gdi32", EntryPoint="CreateFontW")]
static extern IntPtr CreateFontW(
            [In] Int32 nHeight,
            [In] Int32 nWidth,
            [In] Int32 nEscapement,
            [In] Int32 nOrientation,
            [In] Int32 fnWeight,
            [In] UInt32 fdwItalic,
            [In] UInt32 fdwUnderline,
            [In] UInt32 fdwStrikeOut,
            [In] UInt32 fdwCharSet,
            [In] UInt32 fdwOutputPrecision,
            [In] UInt32 fdwClipPrecision,
            [In] UInt32 fdwQuality,
            [In] UInt32 fdwPitch,
            [In] String lpszFace);

Several of the parameters to this function use values defined in WinGDI.h, these constants can be faked with enums.

C# Signature:

[DllImport("gdi32.dll")]
static extern IntPtr CreateFont([In] int nHeight,[In] int nWidth,[In] int nEscapement,
            [In] int nOrientation,[In] FontWeight fnWeight,[In] uint fdwItalic,[In] uint fdwUnderline,
            [In] uint fdwStrikeOut,[In] uint fdwCharSet,[In] OutputPrecision fdwOutputPrecision,
            [In] ClipPrecision fdwClipPrecision,[In] Quality fdwQuality,[In] PitchAndFamily fdwPitchAndFamily,
            [In] string lpszFace);

User-Defined Types:

public enum FontWeight
{
    FW_DONTCARE    = 0,
    FW_THIN    = 100,
    FW_EXTRALIGHT  = 200,
    FW_ULTRALIGHT  = 200,
    FW_LIGHT       = 300,
    FW_NORMAL      = 400,
    FW_REGULAR     = 400,
    FW_MEDIUM      = 500,
    FW_SEMIBOLD    = 600,
    FW_DEMIBOLD    = 600,
    FW_BOLD    = 700,
    FW_EXTRABOLD   = 800,
    FW_ULTRABOLD   = 800,
    FW_BLACK       = 900,
    FW_HEAVY       = 900
}

public enum CharSet
{
    ANSI_CHARSET      = 0,
    DEFAULT_CHARSET   = 1,
    SYMBOL_CHARSET    = 2,
    SHIFTJIS_CHARSET  = 128,
    OEM_CHARSET       = 255
}

public enum OutputPrecision
{
    OUT_DEFAULT_PRECIS     = 0,
    OUT_STRING_PRECIS      = 1,
    OUT_CHARACTER_PRECIS       = 2,
    OUT_STROKE_PRECIS      = 3,
    OUT_TT_PRECIS          = 4,
    OUT_DEVICE_PRECIS      = 5,
    OUT_RASTER_PRECIS      = 6,
    OUT_TT_ONLY_PRECIS     = 7,
    OUT_OUTLINE_PRECIS     = 8,
    OUT_SCREEN_OUTLINE_PRECIS  = 9,
    OUT_PS_ONLY_PRECIS     = 10
}

public enum ClipPrecision
{
    CLIP_DEFAULT_PRECIS     = 0,
    CLIP_CHARACTER_PRECIS   = 1,
    CLIP_STROKE_PRECIS      = 2,
    CLIP_MASK           = 0xf,
    CLIP_LH_ANGLES      = (1<<4),
    CLIP_TT_ALWAYS      = (2<<4),
    CLIP_EMBEDDED       = (8<<4)
}

public enum Quality
{
    DEFAULT_QUALITY        = 0,
    DRAFT_QUALITY          = 1,
    PROOF_QUALITY          = 2,
    NONANTIALIASED_QUALITY     = 3,
    ANTIALIASED_QUALITY    = 4,
    CLEARTYPE_QUALITY      = 5,
    CLEARTYPE_NATURAL_QUALITY  = 6
}

public enum PitchAndFamily
{
    DEFAULT_PITCH  = 0,
    FIXED_PITCH    = 1,
    VARIABLE_PITCH = 2,
    MONO_FONT      = 8
}

Notes:

None.

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