实现关机时的效果的一段代码

核心提示：unsigned char bybits[16]={0x55,0x0,0xaa,0x0,0x55,0x0,0xaa,0x0,0x55,0x0,0xaa,0x0,0x55,0x0,0xaa,0x0};HANDLE hBitmap,hBrush;//---void __fastcall TForm1::Button1Cli

　　unsigned char bybits[16]={0x55,0x0,0xaa,0x0,0x55,0x0,0xaa,0x0,
　　　　　　　　　　　　　0x55,0x0,0xaa,0x0,0x55,0x0,0xaa,0x0};
HANDLE hBitmap,hBrush;

//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
　　/使屏幕暗下来
　　HANDLE hdc5;
　　hBitmap=CreateBitmap(8,8,1,1,&bybits[0]);
　　hBrush=CreatePatternBrush(hBitmap);
　　hdc5=GetDC(0);
　　SelectObject(hdc5,hBrush);
　　PatBlt(hdc5,0,0,Screen->Width,Screen->Height,0xa000c9);
　　DeleteObject(hBrush);
　　DeleteObject(hBitmap);
　　ReleaseDC(0,hdc5);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
　　//复原屏幕
　　InvalidateRect(0,0,1);
}
//---------------------------------------------------------------------------