unit1.cpp

来自「本书《C++Builder与WindowsAPI经典范例》附含配套光盘包括132」· C++ 代码 · 共 22 行

//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
//在Form1建构式中
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner), is_dragging_(false),
   Bitmap_(new Graphics::TBitmap()), ScreenCanvas_(new TCanvas())
{
//制造一单色位图交错图像，并备用
Bitmap_->Width = 8;
Bitmap_->Height = 8;
Bitmap_->PixelFormat = pf24bit;
//先删除Bitmap_图样
::PatBlt(Bitmap_->Canvas->Handle, 0, 0, 8, 8, WHITENESS);
//