Generate striped image and set is as background

// stripes.cpp : Defines the entry point for the console application.
//
//
// Magick++ demo to generate a simple text button
//
// Copyright Bob Friesenhahn, 1999, 2000, 2001, 2003
//
#define _CRT_SECURE_NO_WARNINGS
#include <Magick++.h>
#include <string>
#include <sstream>
#include <iostream>

#include "wtypes.h"
#include "windows.h"
#include "wininet.h"
#include "shlobj.h"

#include <sys/stat.h>

using namespace std;

using namespace Magick;

void  SetWallpaper(LPCWSTR);
void GetDesktopResolution(int&, int&);

bool exists (const std::string& name);
bool exists (const char* name);

int main( int argc, char ** argv)
{

  // Initialize ImageMagick install location for Windows
  InitializeMagick(*argv);

  const char * image_name = "button_out.gif";

  try {
    int width, height;

    GetDesktopResolution(width, height);

    Image image;
    image.size(Geometry(width,height));
    // Set draw options
    //image.strokeColor("red");
    Color c;
    int lasti = 0;
    for(int i=rand() % 20; ; i+=rand() % 20) {
        stringstream s;
        //s<<"hsl("<<((int)rand() % 3)*255<<", 255,  127.5)";
        s<<"hsl(59, 255,  "<<((int)rand() % 2)*130<<")";
        c = Color(s.str().c_str());

        image.fillColor(Color(c));
        image.draw( DrawableRectangle(lasti,0, i,height) );
        if(i>width)
            break;

        lasti = i;
    }

    //image.fillColor(Color("green"));

    //image.strokeWidth(0);

    //image.draw( DrawableRectangle(200,200, 270,170) );
    bool written = false;
    try {
      image.write(image_name);
      written = true;
    }
    catch( exception &error_ )
    {
      cout << "Image::write exception: " << error_.what() << endl;
      system("Pause");
      return 1;
    }
    if(written)
      SetWallpaper((LPCWSTR)image_name);
      //SystemParametersInfo( SPI_SETDESKWALLPAPER, 0, (PVOID)"button_out.gif", SPIF_UPDATEINIFILE );

    image.display();

    // Display on screen
    // button.display();


  }
  catch( exception &error_ )
    {
      cout << "Caught exception: " << error_.what() << endl;
      system("Pause");
      return 1;
    }
  /*
  */
  system("Pause");
  return 0;
}

bool exists (const std::string& name) {
  struct stat buffer;
  return (stat (name.c_str(), &buffer) == 0);
}
bool exists(const char* name) {
  struct stat buffer;
  return (stat (name, &buffer) == 0);
}

// Get the horizontal and vertical screen sizes in pixel
void GetDesktopResolution(int& horizontal, int& vertical)
{
   RECT desktop;
   // Get a handle to the desktop window
   const HWND hDesktop = GetDesktopWindow();
   // Get the size of screen to the variable desktop
   GetWindowRect(hDesktop, &desktop);
   // The top left corner will have coordinates (0,0)
   // and the bottom right corner will have coordinates
   // (horizontal, vertical)
   horizontal = desktop.right;
   vertical = desktop.bottom;
}

void  SetWallpaper(LPCWSTR file){
    if(!exists((const char* )file)) {
     wcout << "The file "<<file<<" does not exist!" << endl;
     return;
    }
    CoInitializeEx(0,COINIT_APARTMENTTHREADED);
    IActiveDesktop* desktop;
    HRESULT status = CoCreateInstance(CLSID_ActiveDesktop,NULL,CLSCTX_INPROC_SERVER,IID_IActiveDesktop,(void**)&desktop);
    WALLPAPEROPT wOption;
    ZeroMemory(&wOption, sizeof(WALLPAPEROPT));
    wOption.dwSize=sizeof(WALLPAPEROPT);
    wOption.dwStyle = WPSTYLE_CENTER;
    status = desktop->SetWallpaper(file,0);
    wcout <<"0x"<<hex<< (unsigned int)status << endl;
    status = desktop->SetWallpaperOptions(&wOption,0);
    wcout <<"0x"<<hex<< (unsigned int) status << endl;
    status = desktop->ApplyChanges(AD_APPLY_ALL);
    wcout <<"0x"<<hex<< (unsigned int) status << endl;
    desktop->Release();
    CoUninitialize();
}