VC++ 设置桌面壁纸

Windows Shell API提供了接口IActiveDesktop来完成墙纸的设置。

//IActiveDesktop 接口方法表　（详情参见MSDN）

AddDesktopItem
AddDesktopItemWithUI
AddUrl
ApplyChange
GenerateDesktopItemHtml
GetDesktopItem
GetDesktopItemByID
GetDesktopItemBySource
GetDesktopItemCount
GetDesktopItemOptions
GetPattern
GetWallpaper
GetWallpaperOptions
ModifyDesktopItem
RemoveDesktopItem
SetDesktopItemOptions
SetPattern
SetWallpaper
SetWallpaperOptions

 　　C++ Code 

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BOOL SetWallpaper(CString &strPicFile, DWORD dwStyle) {     HRESULT hr = S_OK;     IActiveDesktop* pIAD = NULL;          //创建接口的实例     hr = CoCreateInstance(CLSID_ActiveDesktop, NULL, CLSCTX_INPROC_SERVER, IID_IActiveDesktop, (void**) &pIAD );     if (FAILED(hr))     {         return FALSE;     }          //将文件名改为宽字符串,这是IActiveDesktop::SetWallpaper的要求     WCHAR wszWallpaper [MAX_PATH] = {0};     LPTSTR lpStr = strPicFile.GetBuffer(strPicFile.GetLength() );     MultiByteToWideChar(CP_ACP, 0, lpStr, -1, wszWallpaper, MAX_PATH);     strPicFile.ReleaseBuffer();          //设置墙纸     hr = pIAD->SetWallpaper(wszWallpaper, 0);     if (FAILED(hr))     {         return FALSE;     }          //设置墙纸的样式     WALLPAPEROPT wpo;     wpo.dwSize = sizeof(wpo);     wpo.dwStyle = dwStyle;     hr = pIAD->SetWallpaperOptions(&wpo, 0);     if(!SUCCEEDED(hr))     {         return FALSE;     }           //应用墙纸的设置     hr = pIAD->ApplyChanges(AD_APPLY_ALL);     if(!SUCCEEDED(hr))     {         return FALSE;     }           //读取墙纸的文件名并打印在debug窗口内     hr = pIAD->GetWallpaper(wszWallpaper, MAX_PATH, 0);     CString strFile = wszWallpaper;     TRACE(strFile);           //释放接口的实例     pIAD->Release();     return TRUE; } BOOL EnableActiveDesktop(BOOL bEnable) {     HRESULT hr = S_OK;     IActiveDesktop* pIAD = NULL;          //创建接口的实例     hr = CoCreateInstance ( CLSID_ActiveDesktop, NULL, CLSCTX_INPROC_SERVER, IID_IActiveDesktop, (void**) &pIAD );     if(!SUCCEEDED(hr))     {         return FALSE;     }           //启用或关闭Active desktop     COMPONENTSOPT comp;     comp.dwSize = sizeof(comp);     comp.fEnableComponents = bEnable;     comp.fActiveDesktop = bEnable;     hr = pIAD->SetDesktopItemOptions(&comp, 0);     if(!SUCCEEDED(hr))     {         return FALSE;     }           //释放接口的实例     pIAD->Release;     return TRUE; }

　　Demo下载：http://pan.baidu.com/s/1bpjFyNX