Printing (C++)

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To get a list of installed and available printers, use the Printers property. An instance of the class TPrinter uses a TCanvas (which is identical to the form's TCanvas) which means that anything that can be drawn on a form can be printed as well. To print an image, call the BeginDoc method followed by whatever canvas graphics you want to print (including text through the TextOut method) and send the job to the printer by calling the EndDoc method.

Example

The following example uses a button and a memo on a form. When the user clicks the button, the content of the memo is printed with a 200-pixel border around the page. To run this example successfully, include <Printers.hpp> in your unit file.

void __fastcall TForm1::Button1Click(TObject *Sender) {
	TPrinter *Prntr = Printer();
	TRect r = Rect(200, 200, Prntr->PageWidth - 200, Prntr->PageHeight - 200);
	Prntr->BeginDoc();
	for (int i = 0; i < Memo1->Lines->Count; i++)
		Prntr->Canvas->TextOut(200,
			200 + (i * Prntr->Canvas->TextHeight(Memo1->Lines->Strings[i])),
			Memo1->Lines->Strings[i]);
	Prntr->Canvas->Brush->Color = clBlack;
	Prntr->Canvas->FrameRect(r);
	Prntr->EndDoc();
}