Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

{ 
  Example for the use of EnumFontFamilies. This example requires two 
  listboxes on a form. 

  Beispiel fur die Verwendung vo EnumFontFamilies. Das Beispiel benotigt 
  2 Listboxen auf der Form. 
}


 procedure TForm1.FormCreate(Sender: TObject);
 begin
   Listbox1.Items.Assign(Screen.Fonts);
 end;

 function EnumProc(var elf: TEnumLogFont;
   var ntm: TNewTextmetric;
   FontType: Integer;
   listbox: TListbox): Integer; stdcall;
 var
   S: string;
 begin
   if fonttype = TRUETYPE_FONTTYPE then
   begin
     listbox.Items.Add(Format('Name: %s', [elf.elfFullName]));
     listbox.Items.Add(Format('Style: %s', [elf.elfStyle]));
   end
   else
     listbox.Items.Add(Format('Name: %s', [elf.elfLogfont.lfFacename]));
   listbox.Items.Add(Format('Size: %d', [elf.elfLogFont.lfHeight]));
   listbox.Items.Add(Format('Weight: %d', [elf.elfLogFont.lfWeight]));
   if elf.elfLogFont.lfItalic <> 0 then
     listbox.Items.Add('This font is italic');
   case FontType of
     DEVICE_FONTTYPE: S   := 'device font';
     RASTER_FONTTYPE: S   := 'raster font';
     TRUETYPE_FONTTYPE: S := 'truetype font'
       else
         S := 'unknown font type';
   end;
   listbox.Items.Add(Format('This is a %s', [S]));
   Result := 1;
 end;

 procedure TForm1.ListBox1Click(Sender: TObject);
 begin
   listbox2.Clear;
   with listbox1 do
     if ItemIndex >= 0 then
       EnumFontFamilies(Self.Canvas.Handle, PChar(Items[ItemIndex]),
         @EnumProc, Longint(Listbox2));
 end;