screencanvas.cpp

来自「《bcb深度历险》 电子书」· C++ 代码 · 共 27 行

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "ScreenCanvas.h"

//---------------------------------------------------------------------------

#pragma package(smart_init)

__fastcall TScreenCanvas::~TScreenCanvas()
{
  FreeContext();
}

void __fastcall TScreenCanvas::FreeContext()
{
  ReleaseDC(0, Handle);
  Handle = 0;
}

void __fastcall TScreenCanvas::CreateHandle(void)
{
  Handle = GetDC(0);
}