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Unit1.cpp：源码内容

							//---------------------------------------------------------------------------
#include <vcl.h>
#include <printers.hpp>
#pragma hdrstop
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  tagRECT drect;
  AnsiString ass;
  int left,top,right,bottom,dpix,dpiy,asslen;
  TPrinter *prn;
  prn=Printer();
  prn->Title="打印文本示例";
  prn->BeginDoc();
  dpix=GetDeviceCaps(prn->Handle,LOGPIXELSX);
  dpiy=GetDeviceCaps(prn->Handle,LOGPIXELSY);
  left=2*dpix/2.54;
  top=2*dpiy/2.54;
  right=left+5*dpix/2.54;
  bottom=top+5*dpix/2.54;
  prn->Canvas->Font->Name="黑体";
  prn->Canvas->Font->Size=16;
  drect.left=left;drect.top=top;
  drect.right=right;
  drect.bottom=bottom;
  ass="限制文本在矩形框内打印";
  asslen=ass.Length();
  DrawText(prn->Canvas->Handle,ass.c_str(),
      asslen,&drect,DT_CENTER|DT_WORDBREAK);
  prn->Canvas->TextOut(left,bottom,"文本打印示例");
  prn->EndDoc();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
  Graphics::TBitmap *bmp;
  TRect rc;
  int dpix,dpiy;
  TPrinter *prn;
  if(!OpenPictureDialog1->Execute())return;
  bmp = new Graphics::TBitmap();
  prn=Printer();
  prn->Title="打印位图示例";
  try
  {
    bmp->LoadFromFile(OpenPictureDialog1->FileName);
    prn->BeginDoc();
    dpix=GetDeviceCaps(prn->Handle,LOGPIXELSX);
    dpiy=GetDeviceCaps(prn->Handle,LOGPIXELSY);
    rc.left=2*dpix/2.54;
    rc.top=2*dpiy/2.54;
    rc.Right=rc.left+bmp->Width*dpix/96;
    rc.Bottom=rc.left+bmp->Height*dpiy/96;
    prn->Canvas->StretchDraw(rc,bmp);
    prn->EndDoc();
  }
  catch (...)
  {
    ShowMessage("读取位图不正确!");
  }
  delete bmp;
}
//---------------------------------------------------------------------------

						