mainform.cpp

来自「C++ BUILDER精彩编程实例集锦(源码)3 第五部分 系统编程 第六部」· C++ 代码 · 共 38 行

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

#include <vcl.h>
#pragma hdrstop

#include "Mainform.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::BitBtn1Click(TObject *Sender)
{//变暗屏幕
   unsigned char bybits[16]={0x55,0x0,0xaa,0x0,0x55,0x0,0xaa,0x0,0x55,0x0,0xaa,0x0,0x55,0x0,0xaa,0x0};
   HANDLE MyDC;
   HANDLE hBitmap=CreateBitmap(8,8,1,1,&bybits[0]);
   HANDLE hBrush=CreatePatternBrush(hBitmap);
   MyDC=GetDC(0);
   SelectObject(MyDC,hBrush);
   PatBlt(MyDC,0,0,Screen->Width,Screen->Height,0xa000c9);
   DeleteObject(hBrush);
   DeleteObject(hBitmap);
   ReleaseDC(0,MyDC);
}
//---------------------------------------------------------------------------

void __fastcall TForm1::BitBtn2Click(TObject *Sender)
{//恢复屏幕颜色
  InvalidateRect(0,0,1);
}
//---------------------------------------------------------------------------