// VS2005

//head file

#include <wininet.h>
#include<shlobj.h>

// define

IActiveDesktop* m_pADesktop;

///////////////////////////////////

// init com env

HRESULT hr;
CoInitialize(NULL);

m_pADesktop = NULL;
hr = CoCreateInstance(CLSID_ActiveDesktop, NULL, CLSCTX_INPROC_SERVER, IID_IActiveDesktop, (void**)&m_pADesktop);

if (FAILED(hr))
{
         return FALSE;

}

CstringArray m_strArr; /// 图片路径

CString strPath;

for(int i=0; i<10; ++i)

{

        strPath.Format(_T("%d.bmp"), i); // 0.bmp, 1.bmp  and so on, for test

        m_str.Add(strPath);

}

SetTimer(1, 5000, NULL); //每5s更换一次桌布

////////////////////////////////////////////////////////////

// /// key code

//// HRESULT hr;

// for test，在定时器中，间隔指定时间，设置桌布

OnTimer(UINT_PTR nIDEvent)

static int index = 0;

 if (index >= m_strArr.GetCount())
 {
  index = 0;
  return;
 }
 hr = m_pADesktop->SetWallpaper(m_strArr.GetAt(index), 0);
 if(FAILED(hr)) return;

 WALLPAPEROPT wpo;
 wpo.dwSize = sizeof(wpo);
 wpo.dwStyle = WPSTYLE_STRETCH;
 hr = m_pADesktop->SetWallpaperOptions(&wpo, 0);
 if (FAILED(hr))
 {
  return;
 }

 hr = m_pADesktop->ApplyChanges(AD_APPLY_ALL);
 if (FAILED(hr))
 {
  return;
 }

 index++;

////////////////////////////////////////////

// clean

KillTimer(1);

 m_pADesktop->Release();
 CoUninitialize();

//////////////////////////////////////////////

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