Check, if the current printer prints in color

uses
  Printers, WinSpool;

procedure TForm1.Button1Click(Sender: TObject);
var
  Dev, Drv, Prt: array[0..255] of Char;
  DM1: PDeviceMode;
  DM2: PDeviceMode;
  Sz: Integer;
  DevM: THandle;
begin
  Printer.PrinterIndex := -1;
  Printer.GetPrinter(Dev, Drv, Prt, DevM);
  DM1 := nil;
  DM2 := nil;
  Sz  := DocumentProperties(0, 0, Dev, DM1^, DM2^, 0);
  GetMem(DM1, Sz);
  DocumentProperties(0, 0, Dev, DM1^, DM2^, DM_OUT_BUFFER);
  if DM1^.dmColor > 1 then
    label1.Caption := Dev + ': Color'
  else
    label1.Caption := Dev + ': Black and White';
  if DM1^.dmFields and DM_Color <> 0 then
    Label2.Caption := 'Printer supports color printing'
  else
    Label2.Caption := 'Printer does not support color printing';
  FreeMem(DM1);
end;

Autor: Michael Winter