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Unit1.cpp：源码内容

							//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
  BK = new Graphics::TBitmap();
  BK->Width=PaintBox1->Width;
  BK->Height=PaintBox1->Height;
  blFlash=True;
  xx=20;yy=20;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::PaintBox1Paint(TObject *Sender)
{
  if(blFlash)
  {
    PaintBox1->Canvas->Brush->Color=clWhite;
    PaintBox1->Canvas->FillRect(TRect(0,0,PaintBox1->Width,PaintBox1->Height));
    PaintBox1->Canvas->TextOut(xx,yy,"中华人民共和国");
    xx+=6;yy+=6;
  }
  else
  {
    BK->Canvas->Brush->Color=clWhite;
    BK->Canvas->FillRect(TRect(0,0,BK->Width,BK->Height));
    BK->Canvas->TextOut(xx,yy,"全国人民代表大会");
//    PaintBox1->Canvas->CopyMode=cmSrcCopy;
    BitBlt(PaintBox1->Canvas->Handle,0,0,PaintBox1->Width,PaintBox1->Height,BK->Canvas->Handle,0,0,SRCCOPY);
//    PaintBox1->Canvas->CopyRect(Rect(0,0,PaintBox1->Width,PaintBox1->Height),BK->Canvas,Rect(0,0,PaintBox1->Width,PaintBox1->Height));
    xx+=6;yy+=6;
  }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  blFlash=True;
  PaintBox1->Invalidate();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormDestroy(TObject *Sender)
{
  delete BK;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
  blFlash=False;
  PaintBox1->Invalidate();
}
//---------------------------------------------------------------------------

						