Mega Code Archive
Use PASSTHROUGH Escape to Send Data Directly to Printer
<![CDATA[
Title: Use PASSTHROUGH Escape to Send Data Directly to Printer?
{
By using the Windows API Escape() function,
your application can pass data directly to the printer.
If the printer driver supports the PASSTHROUGH printer escape,
you can use the Escape() function and the PASSTHROUGH printer escape
to send native printer language codes to the printer driver.
If the printer driver does not support the PASSTHROUGH printer escape,
you must use the DeviceCapabilities() and ExtDevMode() functions instead.
Mit der Windows API Funktion Escape() kann man Daten direkt zum Drucker schicken.
Wenn der Drucker Treiber dies nicht unterstützt, müssen die DeviceCapabilities()
und ExtDevMode() Funktionen verwendet werden.
}
// DOS like printing using Passthrough command
// you should use "printer.begindoc" and "printer.enddoc"
type
TPrnBuffRec = record
bufflength: Word;
Buff_1: array[0..255] of Char;
end;
function DirectToPrinter(S: string; NextLine: Boolean): Boolean;
var
Buff: TPrnBuffRec;
TestInt: Integer;
begin
TestInt := PassThrough;
if Escape(Printer.Handle, QUERYESCSUPPORT, SizeOf(TESTINT), @testint, nil) 0 then
begin
if NextLine then S := S + #13 + #10;
StrPCopy(Buff.Buff_1, S);
Buff.bufflength := StrLen(Buff.Buff_1);
Escape(Printer.Canvas.Handle, Passthrough, 0, @buff, nil);
Result := True;
end
else
Result := False;
end;
// this code works if the printer supports escape commands
// you can get special esc codes from printer's manual
// example:
printer.BeginDoc;
try
directoprinter('This text ');
finally
printer.EndDoc;
end;
]]>