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TPrinter.Handle Property

Provides access to the handle of the printer object.

Pascal
property Handle: HDC;
C++
__property HDC Handle;

Use Handle to gain access to the handle of the printer object.  

C++ Examples: 

 

{
This example uses a button, a Page Control, and a Print 
dialog box on a form. When the user clicks the button, the 
print dialog is displayed.  The user can select any subset 
of the pages in the page control for printing.  The selected
pages are then printed.  To run this example successfully, 
you must add the Printers unit to the uses clause of your 
unit.  Right click on the PageControl to add at least one 
page to the PageControl.
*/
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  PrintDialog1->Options.Clear();
  PrintDialog1->Options << poPageNums << poSelection;
  PrintDialog1->FromPage = 1;
  PrintDialog1->MinPage = 1;
  PrintDialog1->ToPage = PageControl1->PageCount;
  PrintDialog1->MaxPage = PageControl1->PageCount;
  if (PrintDialog1->Execute())
  {
    int Start, Stop;
    // determine the range the user wants to print
    switch (PrintDialog1->PrintRange)
    {
      case prSelection:
        Start = PageControl1->ActivePage->PageIndex;
        Stop = Start;
        break;
      case prPageNums:
        Start = PrintDialog1->FromPage - 1;
        Stop =  PrintDialog1->ToPage - 1;
        break;
      default:  // prAllPages
        Start = PrintDialog1->MinPage - 1;
        Stop = PrintDialog1->MaxPage - 1;
        break;
    }
    // now, print the pages 
    Printer()->BeginDoc();
    for (int i = Start; i <= Stop; i++)
    {
      PageControl1->Pages[i]->PaintTo(Printer()->Handle, 10, 10);
      if (i != Stop)
        Printer()->NewPage();
    }
    Printer()->EndDoc();
  }
}

 

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