Title: How to Use PASSTHROUGH Escape to Send Data Directly to Printer
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;