uses
 Printers;
//------------------------------------------------------------------------------
// Printer Device Debugging Code to TMemo Componenet
// (c) - 1999 / by A. Weidauer
// <a href="mailto:alex.weiauer@huckfinn.de">alex.weiauer@huckfinn.de</a>
//------------------------------------------------------------------------------
procedure GetDeviceSettings(DevCtrl: TMemo);
var
 Sep: string;
 //-----------------------------------------------
 procedure MakeInt(S: string; key: Integer);
 begin
  S := UpperCase(S);
  DevCtrl.Lines.Add(UpperCase(Format(' %36S = %d ',
  [s, GetDeviceCaps(Printer.Handle, Key)])));
 end;
 //-----------------------------------------------
 function StringToBits(S: string): string;
 var
  H: string;
  i: Integer;
  //-----------------------------------------------
  function SubStr(C: Char): string;
  begin
  if c = '0' then SubStr := '0000';
  if c = '1' then SubStr := '0001';
  if c = '2' then SubStr := '0010';
  if c = '3' then SubStr := '0011';
  if c = '4' then SubStr := '0100';
  if c = '5' then SubStr := '0101';
  if c = '6' then SubStr := '0110';
  if c = '7' then SubStr := '0111';
  if c = '8' then SubStr := '1000';
  if c = '9' then SubStr := '1001';
  if c = 'A' then SubStr := '1010';
  if c = 'B' then SubStr := '1011';
  if c = 'C' then SubStr := '1100';
  if c = 'D' then SubStr := '1101';
  if c = 'E' then SubStr := '1110';
  if c = 'F' then SubStr := '1111';
  end;
  //-----------------------------------------------
 begin
  StringToBits := '';
  S := UpperCase(s);
  H := '';
  if Length(S) = 0 then Exit;
  if Length(S) = 1 then S := '0000' + S;
  if Length(S) = 2 then S := '000' + S;
  if Length(S) = 3 then S := '00' + S;
  if Length(S) = 4 then S := '0' + S;
  for i := 1 to Length(s) do
  H := H + ' ' + SubStr(S[i]);
  StringToBits := H;
 end;
 //-----------------------------------------------
 procedure MakeHex(S: string; key: Cardinal);
 var
  h: string;
 begin
  S := UpperCase(S);
  h := Format('%X', [GetDeviceCaps(Printer.Handle, Key)]);
  if Length(H) = 0 then Exit;
  if Length(H) = 1 then H := '0000' + H;
  if Length(H) = 2 then H := '000' + H;
  if Length(H) = 3 then H := '00' + H;
  if Length(H) = 4 then H := '0' + H;
  DevCtrl.Lines.Add('');
  DevCtrl.Lines.Add(SEP);
  DevCtrl.Lines.Add('');
  DevCtrl.Lines.Add(Format('%37S = Flags(%S) Key(%S)',
  [s, h, StringToBits(H)]
  ));
  // (( GetDeviceCaps(Printer.Handle,Key),
 end;
 //----------------------------------------------------
 procedure MakeFlag(S: string; key, subKey: Cardinal);
 var
  i: Cardinal;
 begin
  S := UpperCase(S);
  i := GetDeviceCaps(Printer.Handle, Key);
  if i and SubKey <> 0 then
  DevCtrl.Lines.Add(Format(' %34S = Flag(%4S) Key(%6D,%S)',
  [s, 'ON ', SubKey, StringToBits(Format('%x', [SubKey]))]))
  else
  DevCtrl.Lines.Add(Format(' %34S = Flag(%4S) Key(%6D,%S)',
  [s, 'OFF', SubKey, StringToBits(Format('%x', [SubKey]))]))
 end;
 //----------------------------------------------------
 function TechnoToStr(i: Integer): string;
 begin
  TechnoToStr := '#ERROR# is Unknwon';
  case i of
  DT_PLOTTER: TechnoToStr := 'Vector Plotter';
  DT_RASDISPLAY: TechnoToStr := 'Raster Display';
  DT_RASPRINTER: TechnoToStr := 'Raster Printer';
  DT_RASCAMERA: TechnoToStr := 'Raster Camera';
  DT_CHARSTREAM: TechnoToStr := 'Character Stream';
  DT_METAFILE: TechnoToStr := 'Metafile';
  DT_DISPFILE: TechnoToStr := 'Display file';
  end;
 end;
 //--Main Procedure
 //----------------------------------------------------------
begin
 DevCtrl.SetFocus;
 DevCtrl.Visible := False;
 if Printer.PrinterIndex < 0 then Exit;
 // Device Organisation
 try
  if not (GetMapMode(Printer.Handle) = MM_TEXT) then
  SetMapMode(Printer.Handle, MM_Text);
  DevCtrl.Clear;
  Sep := '______________________________________________________________________________________________';
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  DevCtrl.Lines.Add(' PRINTER : ' + Printer.Printers[Printer.PrinterIndex]);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  DevCtrl.Lines.Add(Format('%36S = %D', ['NUMBER Of COPIES', Printer.Copies]));
  if Printer.Orientation = poLandscape then
  DevCtrl.Lines.Add(Format('%36S = LANDSCAPE', ['ORIENTATION']));
  if Printer.Orientation = poPortrait then
  DevCtrl.Lines.Add(Format('%36S = PORTRAIT', ['ORIENTATION']));

  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeInt('DRIVERVERSION', DRIVERVERSION);
  DevCtrl.Lines.Add(Format(' %36S = %S', ['TECHNOLOGY',
  UpperCase(TechnoToStr(GetDeviceCaps(Printer.Handle, Technology)))]));
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeInt('WIDTH [mm]', HORZSIZE);
  MakeInt('HEIGHT [mm]', VERTSIZE);
  MakeInt('WIDTH [pix]', HORZRES);
  MakeInt('HEIGHT [pix]', VERTRES);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeInt('Physical Width [pix]', PHYSICALWIDTH);
  MakeInt('Physical Height[pix]', PHYSICALHEIGHT);
  MakeInt('Physical Offset X [pix]', PHYSICALOFFSETX);
  MakeInt('Physical Offset Y [pix]', PHYSICALOFFSETY);
  MakeInt('SCALING FACTOR X', SCALINGFACTORX);
  MakeInt('SCALING FACTOR Y', SCALINGFACTORY);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeInt('horizontal [DPI]', LOGPIXELSX);
  MakeInt('vertial [DPI]', LOGPIXELSY);
  MakeInt('BITS PER PIXEL', BITSPIXEL);
  MakeInt('COLOR PLANES', PLANES);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeInt('NUMBER OF BRUSHES', NUMBRUSHES);
  MakeInt('NUMBER OF PENS', NUMPENS);
  MakeInt('NUMBER OF FONTS', NUMFONTS);
  MakeInt('NUMBER OF COLORS', NUMCOLORS);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeInt('ASPECT Ratio X [DPI]', ASPECTX);
  MakeInt('ASPECT Ratio Y [DPI]', ASPECTY);
  MakeInt('ASPECT Ratio XY [DPI]', ASPECTXY);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeInt('SIZE OF PALETTE', SIZEPALETTE);
  MakeInt('RESERVED TO SYSTEM PALETTE **', NUMRESERVED);
  MakeInt('ACTUAL RASTER RESOLUTION **', COLORRES);
  DevCtrl.Lines.Add('');
  DevCtrl.Lines.Add(' **...only true if KEY RASTERCAPS(RC_PALETTE)= ON');
  MakeFlag('... KEY RASTERCAPS (RC_PALETTE)', RasterCaps, RC_PALETTE);
  DevCtrl.Lines.Add('');
  MakeHex('Clipping Capablities ', ClipCaps);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeFlag('No Support ', ClipCaps, CP_NONE);
  MakeFlag('Support Rectangles', ClipCaps, CP_RECTANGLE);
  MakeFlag('Support PolyRegion 32 Bit', ClipCaps, CP_REGION);
  MakeHex('Raster Printing Flags ', RasterCaps);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeFlag('Support Bitmap Transfer', RasterCaps, RC_BITBLT);
  MakeFlag('Support Banding', RasterCaps, RC_BANDING);
  MakeFlag('Support Scaling', RasterCaps, RC_SCALING);
  MakeFlag('Support Bitmaps > 64 kByte', RasterCaps, RC_BITMAP64);
  MakeFlag('Support features of Win 2.0', RasterCaps, RC_GDI20_OUTPUT);
  MakeFlag('Support Set~/GetDIBITS()', RasterCaps, RC_DI_BITMAP);
  MakeFlag('Support Palette Devices', RasterCaps, RC_PALETTE);
  MakeFlag('Support SetDIBitsToDevice()', RasterCaps, RC_DIBTODEV);
  MakeFlag('Support Floodfill', RasterCaps, RC_FLOODFILL);
  MakeFlag('Support StretchBlt()', RasterCaps, RC_STRETCHBLT);
  MakeFlag('Support StretchBID()', RasterCaps, RC_STRETCHDIB);
  MakeFlag('Support DIBS', RasterCaps, RC_DEVBITS);
  MakeHex('Curve Printion Flages', CurveCaps);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeFlag('No Curve support', CurveCaps, CC_NONE);
  MakeFlag('Support Circles', CurveCaps, CC_Circles);
  MakeFlag('Support Pie', CurveCaps, CC_PIE);
  MakeFlag('Support Arces', CurveCaps, CC_CHORD);
  MakeFlag('Support Ellipses', CurveCaps, CC_ELLIPSEs);
  MakeFlag('Support WIDE FRAMES', CurveCaps, CC_WIDE);
  MakeFlag('Support STYLED FRAMES', CurveCaps, CC_STYLED);
  MakeFlag('Support WIDE&STYLED FRAMES', CurveCaps, CC_WIDESTYLED);
  MakeFlag('Support INTERIORS', CurveCaps, CC_INTERIORS);
  MakeFlag('Support ROUNDRECT', CurveCaps, CC_ROUNDRECT);
  MakeHex('Line & Polygon Printing Flags', LineCaps);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeFlag('No Line Support', LineCaps, LC_NONE);
  MakeFlag('Support Polylines', LineCaps, LC_PolyLine);
  MakeFlag('Support Marker', LineCaps, LC_Marker);
  MakeFlag('Support PolyMarker', LineCaps, LC_PolyMarker);
  MakeFlag('Support Wide Lines', LineCaps, LC_WIDE);
  MakeFlag('Support STYLED Lines', LineCaps, LC_STYLED);
  MakeFlag('Support WIDE&STYLED Lines', LineCaps, LC_WIDESTYLED);
  MakeFlag('Support Lines Interiors', LineCaps, LC_INTERIORS);
  MakeHex('Polygon (Areal) Printing Flags', POLYGONALCAPS);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeFlag('No Polygon Support', PolygonalCaps, PC_NONE);
  MakeFlag('Filling Alternate Polygons', PolygonalCaps, PC_POLYGON);
  MakeFlag('Drawing Rectangles', PolygonalCaps, PC_RECTANGLE);
  MakeFlag('Filling Winding Polygons', PolygonalCaps, PC_WINDPOLYGON);
  MakeFlag('Drawing Trapezoid (??Flag)', PolygonalCaps, PC_Trapezoid);
  MakeFlag('Drawing a ScanLine', PolygonalCaps, PC_SCANLINE);
  MakeFlag('Drawing Wide Border', PolygonalCaps, PC_WIDE);
  MakeFlag('Drawing Styled Border', PolygonalCaps, PC_STYLED);
  MakeFlag('Drawing WIDE&STYLED Border', PolygonalCaps, PC_WIDESTYLED);
  MakeFlag('Drawing Interiors', PolygonalCaps, PC_INTERIORS);
  MakeHex('Text Printing Flags', TEXTCAPS);
  DevCtrl.Lines.Add(sep);
  DevCtrl.Lines.Add('');
  MakeFlag('Support Character Output Precision', TextCaps, TC_OP_CHARACTER);
  MakeFlag('Support Stroke Output Precision', TextCaps, TC_OP_STROKE);
  MakeFlag('Support Stroke Clip Precision', TextCaps, TC_CP_STROKE);
  MakeFlag('Support 90° Character Rotation', TextCaps, TC_CR_90);
  MakeFlag('Support any Character Rotaion', TextCaps, TC_CR_ANY);
  MakeFlag('Support Character Scaling in X&Y', TextCaps, TC_SF_X_YINDEP);
  MakeFlag('Support Character Scaling REAL', TextCaps, TC_SA_DOUBLE);
  MakeFlag('Support Character Scaling RATIONAL', TextCaps, TC_SA_INTEGER);
  MakeFlag('Support Character Scaling EXACT', TextCaps, TC_SA_CONTIN);
  MakeFlag('Support Character Weight REAL', TextCaps, TC_EA_DOUBLE);
  MakeFlag('Support Character Italic', TextCaps, TC_IA_ABLE);
  MakeFlag('Support Character Underline', TextCaps, TC_UA_ABLE);
  MakeFlag('Support Character Strikeout', TextCaps, TC_SO_ABLE);
  MakeFlag('Support Character as RASTER FONT', TextCaps, TC_RA_ABLE);
  MakeFlag('Support Character as VECTOR FONT', TextCaps, TC_VA_ABLE);
  MakeFlag('Reserved Flag ???', TextCaps, TC_Reserved);
  MakeFlag('DEVICE NOT USE a SCROLLBIT BLOCK ?', TextCaps, TC_SCROLLBLT);
  DevCtrl.Lines.Insert(0, '..THE RESULTS ARE:');
 except
  // MessageDlg('The Current Printer is not valid ! ',
  // mtError,[mbok],0);
  Printer.PrinterIndex := -1;
  DevCtrl.Lines.Add(' ! The Printer is not valid !');
 end;
 DevCtrl.Visible := True;
 DevCtrl.SetFocus;
end;