Mega Code Archive
How to Check if a printer supports postscript
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Title: How to Check if a printer supports postscript
uses
WinSpool, Printers;
{: Check if the currently selected printer supports postscript.
Only applicable on Win2K/XP! }
function PrinterSupportsPostscript: Boolean;
const
POSTSCRIPT_PASSTHROUGH = 4115;
POSTSCRIPT_IDENTIFY = 4117;
Escapes: array[0..2] of Cardinal =
(POSTSCRIPT_DATA, POSTSCRIPT_IDENTIFY, POSTSCRIPT_PASSTHROUGH);
var
res: Integer;
i: Integer;
begin
Result := false;
for i := Low(Escapes) to High(Escapes) do begin
res := ExtEscape(printer.Handle,
QUERYESCSUPPORT,
sizeof(Escapes[0]),
@Escapes[i], 0, nil);
if res 0 then begin
Result := true;
Break;
end;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
const
boolstr: array[Boolean] of string = (' not', '');
var
i: Integer;
S: string;
begin
for i := 0 to Printer.Printers.Count - 1 do begin
Printer.PrinterIndex := i;
memo1.Lines.add(
Format('Printer %s does%s support Postscript',
[printer.printers[printer.printerindex],
boolstr[PrinterSupportsPostscript]]));
end;
end;
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