// SCRAMBLE.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "resource.h"
#include <windows.h>
#include "math.h"

#define NUM  300

LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   PSTR      szCmdLine,
                   int       iCmdShow)
{
	static  int  iKeep[NUM][4];
 	HDC          hdcScr,hdcMem;
	int          cx,cy;
	HBITMAP      hBitmap;
	HWND         hwnd;
	int          i,j,x1,y1,x2,y2;

	if(LockWindowUpdate(hwnd=GetDesktopWindow()))
	{
		hdcScr = GetDCEx(hwnd,NULL,DCX_CACHE|DCX_LOCKWINDOWUPDATE);
		hdcMem = CreateCompatibleDC(hdcScr);
		cx     = GetSystemMetrics(SM_CXSCREEN)/10;
        cy     = GetSystemMetrics(SM_CXSCREEN)/10;
		hBitmap= CreateCompatibleBitmap(hdcScr,cx,cy);

		SelectObject(hdcMem,hBitmap);

		srand((int)GetCurrentTime());

		for(i=0;i<2;i++)
		for(j=0;j<NUM;j++)
		{
			if(i==0)
			{
				iKeep[j][0]=x1=cx*(rand()%10);
				iKeep[j][1]=y1=cy*(rand()%10);
                iKeep[j][2]=x2=cx*(rand()%10);
				iKeep[j][3]=y2=cy*(rand()%10);
			}
			else
			{
				x1=iKeep[NUM-1-j][0];
				y1=iKeep[NUM-1-j][1];
				x2=iKeep[NUM-1-j][2];
				y2=iKeep[NUM-1-j][3];
			}
			BitBlt(hdcMem,0,0,cx,cy,hdcScr,x1,y1,SRCCOPY);
			BitBlt(hdcScr,x1,y1,cx,cy,hdcScr,x2,y2,SRCCOPY);
            BitBlt(hdcScr,x2,y2,cx,cy,hdcMem,0,0,SRCCOPY);
            
			Sleep(10);
	}
	DeleteDC(hdcMem);
	ReleaseDC(hwnd,hdcScr);
	DeleteObject(hBitmap);

	LockWindowUpdate(NULL);
}
return FALSE;
}