The DeleteAll method removes all IWMSCacheItem interfaces from the IWMSCacheItems collection.

HRESULT DeleteAll();


This method does not take any parameters.

Return Value

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.


#include <windows.h>
#include <atlbase.h>    // Includes CComVariant.
#include "wmsserver.h"

// Declare variables and interfaces.
IWMSServer                  *pServer;
IWMSPlugins                 *pPlugins;
IWMSPlugin                  *pPlugin;
IWMSCacheProxyPlugin        *pCacheProxyPlugin;
IWMSCacheItems              *pCacheItems;
IWMSCacheItem               *pCacheItem;

HRESULT         hr;
CComVariant     varIndex;
long            lCount;

// Initialize the COM library and retrieve a pointer
// to an IWMSServer interface.
hr = CoInitialize(NULL);
hr = CoCreateInstance(CLSID_WMSServer,
                      (void **)&pServer);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to an IWMSPlugins interface
// that contains cache proxy plug-ins.
hr = pServer->get_CacheProxy(&pPlugins);
if (FAILED(hr)) goto EXIT;
hr = pPlugins->get_Count(&lCount);
if (FAILED(hr)) goto EXIT;

// Retrieve the IWMSPlugin interface for the
// first cache proxy plug-in.
varIndex = 0;
hr = pPlugins->get_Item(varIndex, &pPlugin);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to the IWMSCacheProxyPlugin interface.
hr = pPlugin->QueryInterface(IID_IWMSCacheProxyPlugin,
                            (void **)&pCacheProxyPlugin);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to the IWMSCacheItems interface,
// and retrieve the count of cache items.
hr = pCacheProxyPlugin->get_CacheItems(&pCacheItems);
if (FAILED(hr)) goto EXIT;
hr = pCacheItems->get_Count(&lCount);
if (FAILED(hr)) goto EXIT;

// Remove all of the remaining cache items.
hr = pCacheProxyPlugin->DeleteAll();
if (FAILED(hr)) goto EXIT;

    // TODO: Release temporary COM objects and uninitialize COM.


Header: wmsserver.h.

Library: WMSServerTypeLib.dll.

Platform: Windows ServerĀ 2003 family, Windows ServerĀ 2008 family.

See Also


IWMSCacheItem Interface

IWMSCacheItems Interface