使用对EnumFontFamiliesEx的DLL调用枚举C#中的活动字体使我感到非常困惑

我的最终目标是列出windows计算机上的所有活动字体。例如，如果您启动写字板或Word，您将看到它们。其中一些字体来自windows\fonts文件夹，但不是全部。有些是使用gdi32.dll调用AddFontResource（…）动态注册的。现在，你可能认为C#支持检索整个列表，如果是，请告诉我

然而，在花了很多时间在这上面之后，为了安装系统字体而进行的常规C#调用只会检索到所有实际活动的字体中的一部分。例如，InstalledFontCollection.Families找不到随AddFontResource添加的任何字体（它找到写字板中列出的字体的25%）

虽然我想在C#中执行此操作，但似乎我必须使用更多的gdi32.dll调用。我的EnumFontFamiliesEx问题就这样开始了

我已经成功地使下面的代码工作到了一个地步，我得到了一堆带有字体的回调。但是，结构ENUMLOGFONTEX似乎已损坏，例如lpelfe.elfFullName通常包含两个方形字符，而不是实名。也许我在编组或结构定义方面犯了错误，我不太确定。我尝试了多次迭代和无休止的谷歌搜索，但都没有用

任何帮助都将不胜感激

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows.Media;
using System.Runtime.InteropServices;
using Microsoft.Win32;


namespace FontRetriever
{
public partial class TestForm : Form
{

    [DllImport("gdi32.dll")]
    static extern int EnumFontFamiliesEx(IntPtr hdc,
    [In] IntPtr pLogfont,
    EnumFontExDelegate lpEnumFontFamExProc,
    IntPtr lParam,
    uint dwFlags);

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public class LOGFONT
    {
        public int lfHeight;
        public int lfWidth;
        public int lfEscapement;
        public int lfOrientation;
        public FontWeight lfWeight;
        [MarshalAs(UnmanagedType.U1)]
        public bool lfItalic;
        [MarshalAs(UnmanagedType.U1)]
        public bool lfUnderline;
        [MarshalAs(UnmanagedType.U1)]
        public bool lfStrikeOut;
        public FontCharSet lfCharSet;
        public FontPrecision lfOutPrecision;
        public FontClipPrecision lfClipPrecision;
        public FontQuality lfQuality;
        public FontPitchAndFamily lfPitchAndFamily;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string lfFaceName;
    }

    public enum FontWeight : int
    {
        FW_DONTCARE = 0,
        FW_THIN = 100,
        FW_EXTRALIGHT = 200,
        FW_LIGHT = 300,
        FW_NORMAL = 400,
        FW_MEDIUM = 500,
        FW_SEMIBOLD = 600,
        FW_BOLD = 700,
        FW_EXTRABOLD = 800,
        FW_HEAVY = 900,
    }
    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,
    }
    public enum FontPrecision : byte
    {
        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 FontClipPrecision : byte
    {
        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_DFA_DISABLE = (4 << 4),
        CLIP_EMBEDDED = (8 << 4),
    }
    public enum FontQuality : byte
    {
        DEFAULT_QUALITY = 0,
        DRAFT_QUALITY = 1,
        PROOF_QUALITY = 2,
        NONANTIALIASED_QUALITY = 3,
        ANTIALIASED_QUALITY = 4,
        CLEARTYPE_QUALITY = 5,
        CLEARTYPE_NATURAL_QUALITY = 6,
    }
    [Flags]
    public enum FontPitchAndFamily : byte
    {
        DEFAULT_PITCH = 0,
        FIXED_PITCH = 1,
        VARIABLE_PITCH = 2,
        FF_DONTCARE = (0 << 4),
        FF_ROMAN = (1 << 4),
        FF_SWISS = (2 << 4),
        FF_MODERN = (3 << 4),
        FF_SCRIPT = (4 << 4),
        FF_DECORATIVE = (5 << 4),
    }

    [StructLayout(LayoutKind.Sequential)]
    public class NEWTEXTMETRICEX
    {
        //public const int LF_FACESIZE = 32;
        public int tmHeight;
        public int tmAscent;
        public int tmDescent;
        public int tmInternalLeading;
        public int tmExternalLeading;
        public int tmAveCharWidth;
        public int tmMaxCharWidth;
        public int tmWeight;
        public int tmOverhang;
        public int tmDigitizedAspectX;
        public int tmDigitizedAspectY;
        public char tmFirstChar;
        public char tmLastChar;
        public char tmDefaultChar;
        public char tmBreakChar;
        public byte tmItalic;
        public byte tmUnderlined;
        public byte tmStruckOut;
        public byte tmPitchAndFamily;
        public byte tmCharSet;
    }



    private const byte DEFAULT_CHARSET = 1;
    private const byte SHIFTJIS_CHARSET = 128;
    private const byte JOHAB_CHARSET = 130;
    private const byte EASTEUROPE_CHARSET = 238;

    private const byte DEFAULT_PITCH = 0;
    private const byte FIXED_PITCH = 1;
    private const byte VARIABLE_PITCH = 2;
    private const byte FF_DONTCARE = (0 << 4);
    private const byte FF_ROMAN = (1 << 4);
    private const byte FF_SWISS = (2 << 4);
    private const byte FF_MODERN = (3 << 4);
    private const byte FF_SCRIPT = (4 << 4);
    private const byte FF_DECORATIVE = (5 << 4);


    public TestForm()
    {
        InitializeComponent();
    }


    private int cnt = 0;


    private void TestForm_Load(object sender, EventArgs e)
    {
        LOGFONT lf = CreateLogFont("");

        IntPtr plogFont = Marshal.AllocHGlobal(Marshal.SizeOf(lf));
        Marshal.StructureToPtr(lf, plogFont, true);

        int ret = 0;
        try
        {
            Graphics G = pictureBox1.CreateGraphics();
            IntPtr P = G.GetHdc();

            del1 = new EnumFontExDelegate(callback1);
            ret = EnumFontFamiliesEx(P, plogFont, del1, IntPtr.Zero, 0);

            System.Diagnostics.Trace.WriteLine("EnumFontFamiliesEx = " + ret.ToString());
        }
        catch
        {
            System.Diagnostics.Trace.WriteLine("Exception");
        }
    }



    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public struct ENUMLOGFONTEX
    {
        public LOGFONT elfLogFont;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
        public string elfFullName;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string elfStyle;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string elfScript;
    }

    public delegate int EnumFontExDelegate(ref ENUMLOGFONTEX lpelfe, IntPtr lpntme, int FontType, int lParam);
    public EnumFontExDelegate del1;


    public int callback1(ref ENUMLOGFONTEX lpelfe, IntPtr lpntme, int FontType, int lParam)
    {
        try
        {
            ++cnt;

            Font F = Font.FromLogFont(lpelfe.elfLogFont);
            Console.WriteLine(F.Name + "   " + lpelfe.elfFullName);


        }
        catch
        {
            System.Diagnostics.Trace.WriteLine("What happened?");
        }
        return cnt;
    }


    public static LOGFONT CreateLogFont(string fontname)
    {
        LOGFONT lf = new LOGFONT();
        lf.lfHeight = 0;
        lf.lfWidth = 0;
        lf.lfEscapement = 0;
        lf.lfOrientation = 0;
        lf.lfWeight = 0;
        lf.lfItalic = false;
        lf.lfUnderline = false;
        lf.lfStrikeOut = false;
        lf.lfCharSet = FontCharSet.DEFAULT_CHARSET;
        lf.lfOutPrecision = 0;
        lf.lfClipPrecision = 0;
        lf.lfQuality = 0;
        lf.lfPitchAndFamily = FontPitchAndFamily.FF_DONTCARE;
        lf.lfFaceName = "";


        return lf;
    }

}    

使用系统；
使用System.Collections.Generic；
使用系统组件模型；
使用系统数据；
使用系统图；
使用System.Linq；
使用系统文本；
使用System.Windows.Forms；
使用System.Windows.Media；
使用System.Runtime.InteropServices；
使用Microsoft.Win32；
名称空间检索器
{
公共部分类TestForm:Form
{
[DllImport（“gdi32.dll”）]
静态外部int ENUMFONTFAMILESEX（IntPtr hdc，
[In]IntPtr pLogfont，
EnumFontExDelegate lpEnumFontFamExProc，
IntPtr LPRAM，
uint（dwFlags）；
[StructLayout（LayoutKind.Sequential，CharSet=CharSet.Auto）]
公共类LOGFONT
{
公众身高；
公共宽度；
公共擒纵机构；
公众导向；
公众体重；
[Marshallas（UnmanagedType.U1）]
公共图书馆；
[Marshallas（UnmanagedType.U1）]
公共图书馆；
[Marshallas（UnmanagedType.U1）]
公众罢工；
公共fontscharset-lfCharSet；
公共输出精度；
公共fontclipprection lfclipprection；
公共质量；
公共FontPitchAndFamily lfPitchAndFamily；
[Marshallas（UnmanagedType.ByValTStr，SizeConst=32）]
公共字符串名称；
}
公共枚举字体权重：int
{
FW_DONTCARE=0，
FW_THIN=100，
FW_超轻=200，
FW_灯=300，
FW_正常值=400，
FW_中等=500，
FW_半黑体=600，
FW_黑体=700，
FW_EXTRABOLD=800，
FW_重型=900，
}
公共枚举FontCharSet:字节
{
ANSI_字符集=0，
默认字符集=1，
符号_字符集=2，
SHIFTJIS_字符集=128，
Hangul_字符集=129，
韩国语字符集=129，
GB2312_字符集=134，
CHINESEBIG5_字符集=136，
OEM_字符集=255，
JOHAB_CHARSET=130，
希伯来语字符集=177，
阿拉伯文字符集=178，
希腊文字符集=161，
土耳其语字符集=162，
越南语字符集=163，
泰文字符集=222，
东欧字符集=238，
俄语字符集=204，
MAC_CHARSET=77，
波罗的海字符集=186，
}
公共枚举精度：字节
{
OUT\u DEFAULT\u PRECIS=0，
OUT\u STRING\u PRECIS=1，
OUT\u CHARACTER\u PRECIS=2，
输出冲程精度=3，
OUT_TT_PRECIS=4，
输出设备精度=5，
输出光栅精度=6，
OUT_TT_ONLY_PRECIS=7，
OUT\u OUTLINE\u PRECIS=8，
屏幕外轮廓精度=9，
OUT\u PS\u ONLY\u PRECIS=10，
}
公共枚举fontclipprection:字节
{
CLIP\u DEFAULT\u PRECIS=0，
CLIP\u CHARACTER\u PRECIS=1，
卡扣_行程_精度=2，
CLIP_MASK=0xf，
CLIP_LH_ANGLES=（1将CharSet=CharSet.Auto添加到EnumFontFamiliesEx上的DllImport属性应该会解决这个问题。就像Merlyn的提示一样，这是一个ANSI/Unicode不匹配的问题

别忘了释放Marshal.AllocHGlobal分配的内存。
谢谢Mattias的回答。结果我遇到了一些问题，我从其他论坛得到了一些帮助解决这些问题的答案。下面是最后的代码供大家欣赏

[DllImport("gdi32.dll", CharSet = CharSet.Auto)]
static extern int EnumFontFamiliesEx(IntPtr hdc,
                                [In] IntPtr pLogfont,
                                EnumFontExDelegate lpEnumFontFamExProc,
                                IntPtr lParam,
                                uint dwFlags);


[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public class LOGFONT
    {

        public int lfHeight;
        public int lfWidth;
        public int lfEscapement;
        public int lfOrientation;
        public FontWeight lfWeight;
        [MarshalAs(UnmanagedType.U1)]
        public bool lfItalic;
        [MarshalAs(UnmanagedType.U1)]
        public bool lfUnderline;
        [MarshalAs(UnmanagedType.U1)]
        public bool lfStrikeOut;
        public FontCharSet lfCharSet;
        public FontPrecision lfOutPrecision;
        public FontClipPrecision lfClipPrecision;
        public FontQuality lfQuality;
        public FontPitchAndFamily lfPitchAndFamily;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string lfFaceName;
    }


public enum FontWeight : int
    {
        FW_DONTCARE = 0,
        FW_THIN = 100,
        FW_EXTRALIGHT = 200,
        FW_LIGHT = 300,
        FW_NORMAL = 400,
        FW_MEDIUM = 500,
        FW_SEMIBOLD = 600,
        FW_BOLD = 700,
        FW_EXTRABOLD = 800,
        FW_HEAVY = 900,
    }
    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,
    }
    public enum FontPrecision : byte
    {
        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 FontClipPrecision : byte
    {
        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_DFA_DISABLE = (4 << 4),
        CLIP_EMBEDDED = (8 << 4),
    }
    public enum FontQuality : byte
    {
        DEFAULT_QUALITY = 0,
        DRAFT_QUALITY = 1,
        PROOF_QUALITY = 2,
        NONANTIALIASED_QUALITY = 3,
        ANTIALIASED_QUALITY = 4,
        CLEARTYPE_QUALITY = 5,
        CLEARTYPE_NATURAL_QUALITY = 6,
    }
    [Flags]
    public enum FontPitchAndFamily : byte
    {
        DEFAULT_PITCH = 0,
        FIXED_PITCH = 1,
        VARIABLE_PITCH = 2,
        FF_DONTCARE = (0 << 4),
        FF_ROMAN = (1 << 4),
        FF_SWISS = (2 << 4),
        FF_MODERN = (3 << 4),
        FF_SCRIPT = (4 << 4),
        FF_DECORATIVE = (5 << 4),
    }

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public struct NEWTEXTMETRIC
    {
        public int tmHeight;
        public int tmAscent;
        public int tmDescent;
        public int tmInternalLeading;
        public int tmExternalLeading;
        public int tmAveCharWidth;
        public int tmMaxCharWidth;
        public int tmWeight;
        public int tmOverhang;
        public int tmDigitizedAspectX;
        public int tmDigitizedAspectY;
        public char tmFirstChar;
        public char tmLastChar;
        public char tmDefaultChar;
        public char tmBreakChar;
        public byte tmItalic;
        public byte tmUnderlined;
        public byte tmStruckOut;
        public byte tmPitchAndFamily;
        public byte tmCharSet;
        int ntmFlags;
        int ntmSizeEM;
        int ntmCellHeight;
        int ntmAvgWidth;
    }
    public struct FONTSIGNATURE
    {
        [MarshalAs(UnmanagedType.ByValArray)]
        int[] fsUsb;
        [MarshalAs(UnmanagedType.ByValArray)]
        int[] fsCsb;
    }
    public struct NEWTEXTMETRICEX
    {
        NEWTEXTMETRIC ntmTm;
        FONTSIGNATURE ntmFontSig;
    }

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public struct ENUMLOGFONTEX
    {
        public LOGFONT elfLogFont;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
        public string elfFullName;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string elfStyle;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string elfScript;
    }

    private const byte DEFAULT_CHARSET = 1;
    private const byte SHIFTJIS_CHARSET = 128;
    private const byte JOHAB_CHARSET = 130;
    private const byte EASTEUROPE_CHARSET = 238;

    private const byte DEFAULT_PITCH = 0;
    private const byte FIXED_PITCH = 1;
    private const byte VARIABLE_PITCH = 2;
    private const byte FF_DONTCARE = (0 << 4);
    private const byte FF_ROMAN = (1 << 4);
    private const byte FF_SWISS = (2 << 4);
    private const byte FF_MODERN = (3 << 4);
    private const byte FF_SCRIPT = (4 << 4);
    private const byte FF_DECORATIVE = (5 << 4);

…

private void TestForm_Load(object sender, EventArgs e)
    {
        LOGFONT lf = CreateLogFont("");

        IntPtr plogFont = Marshal.AllocHGlobal(Marshal.SizeOf(lf));
        Marshal.StructureToPtr(lf, plogFont, true);

        int ret = 0;
        try
        {
            Graphics G = pictureBox1.CreateGraphics();
            IntPtr P = G.GetHdc();

            del1 = new EnumFontExDelegate(callback1);
            ret = EnumFontFamiliesEx(P, plogFont, del1, IntPtr.Zero, 0);

            System.Diagnostics.Trace.WriteLine("EnumFontFamiliesEx = " + ret.ToString());

            G.ReleaseHdc(P);
        }
        catch
        {
            System.Diagnostics.Trace.WriteLine("Error!");
        }
        finally
        {
            Marshal.DestroyStructure(plogFont, typeof(LOGFONT));

        }
    }

public delegate int EnumFontExDelegate(ref ENUMLOGFONTEX lpelfe, ref NEWTEXTMETRICEX lpntme, int FontType, int lParam);
    public EnumFontExDelegate del1;


    public int callback1(ref ENUMLOGFONTEX lpelfe, ref NEWTEXTMETRICEX lpntme, int FontType, int lParam)
    {
        try
        { 
        // Do something cool
        }
        catch (Exception e)
        {
            System.Diagnostics.Trace.WriteLine(e.ToString());
        }
        return cnt;
    }

public static LOGFONT CreateLogFont(string fontname)
    {
        LOGFONT lf = new LOGFONT();
        lf.lfHeight = 0;
        lf.lfWidth = 0;
        lf.lfEscapement = 0;
        lf.lfOrientation = 0;
        lf.lfWeight = 0;
        lf.lfItalic = false;
        lf.lfUnderline = false;
        lf.lfStrikeOut = false;
        lf.lfCharSet = FontCharSet.DEFAULT_CHARSET;
        lf.lfOutPrecision = 0;
        lf.lfClipPrecision = 0;
        lf.lfQuality = 0;
        lf.lfPitchAndFamily =  FontPitchAndFamily.FF_DONTCARE;
        lf.lfFaceName = "";


        return lf;
    }

[DllImport（“gdi32.dll”，CharSet=CharSet.Auto）]
静态外部int ENUMFONTFAMILESEX（IntPtr hdc，
[In]IntPtr pLogfont，
EnumFontExDelegate lpEnumFontFamExProc，
IntPtr LPRAM，
uint（dwFlags）；
[StructLayout（LayoutKind.Sequential，CharSet=CharSet.Auto）]
公共类LOGFONT
{
公众身高；
公共宽度；
公共擒纵机构；
公众导向；
公众体重；
[Marshallas（UnmanagedType.U1）]
公共图书馆；
[Marshallas（UnmanagedType.U1）]
公共图书馆；
[Marshallas（UnmanagedType.U1）]
公众罢工；
公共fontscharset-lfCharSet；
公共输出精度；
公共fontclipprection lfclipprection；
公共质量；
公共FontPitchAndFamily lfPitchAndFamily；
[Marshallas（UnmanagedType.ByValTStr，SizeConst=32）]
公共字符串名称；
}
公共枚举字体权重：int
{
FW_DONTCARE=0，
FW_THIN=100，
FW_超轻=200，
FW_灯=300，