//+---------------------------------------------------------------------------
//
// Function: HrGetINetCfg
//
// Purpose: Initialize COM, create and initialize INetCfg.
// Obtain write lock if indicated.
//
// Arguments:
// fGetWriteLock [in] whether to get write lock
// ppnc [in] pointer to pointer to INetCfg object
//
// Returns: S_OK on success, otherwise an error code
//
// Notes:
//
HRESULT HrGetINetCfg(IN BOOL fGetWriteLock,
INetCfg** ppnc)
{
HRESULT hr=S_OK;
// Initialize the output parameters.
*ppnc = NULL;
// initialize COM
hr = CoInitializeEx(NULL,
COINIT_DISABLE_OLE1DDE | COINIT_APARTMENTTHREADED );
if (SUCCEEDED(hr))
{
// Create the object implementing INetCfg.
//
INetCfg* pnc;
hr = CoCreateInstance(CLSID_CNetCfg, NULL, CLSCTX_INPROC_SERVER,
IID_INetCfg, (void**)&pnc);
if (SUCCEEDED(hr))
{
INetCfgLock * pncLock = NULL;
if (fGetWriteLock)
{
// Get the locking interface
hr = pnc->QueryInterface(IID_INetCfgLock,
(LPVOID *)&pncLock);
if (SUCCEEDED(hr))
{
// Attempt to lock the INetCfg for read/write
static const ULONG c_cmsTimeout = 15000;
static const WCHAR c_szSampleNetcfgApp[] =
L"Sample Netcfg Application (netcfg.exe)";
PWSTR szLockedBy;
hr = pncLock->AcquireWriteLock(c_cmsTimeout,
c_szSampleNetcfgApp,
&szLockedBy);
if (S_FALSE == hr)
{
hr = NETCFG_E_NO_WRITE_LOCK;
}
}
}
if (SUCCEEDED(hr))
{
// Initialize the INetCfg object.
//
hr = pnc->Initialize(NULL);
if (SUCCEEDED(hr))
{
*ppnc = pnc;
pnc->AddRef();
}
else
{
// initialize failed, if obtained lock, release it
if (pncLock)
{
pncLock->ReleaseWriteLock();
}
}
}
ReleaseObj(pncLock);
ReleaseObj(pnc);
}
if (FAILED(hr))
{
CoUninitialize();
}
}
return hr;
}
HRESULT HrGetINetCfg(
IN BOOL fGetWriteLock,
IN LPCTSTR lpszAppName,
OUT INetCfg** ppnc,
OUT LPTSTR *lpszLockedBy
) {
INetCfg *pnc = NULL;
INetCfgLock *pncLock = NULL;
HRESULT hr = S_OK;
//
// Initialize the output parameters.
//
*ppnc = NULL;
if (lpszLockedBy) {
*lpszLockedBy = NULL;
}
//
// Initialize COM
//
hr = CoInitialize(NULL);
if (hr == S_OK) {
//
// Create the object implementing INetCfg.
//
hr = CoCreateInstance(CLSID_CNetCfg,
NULL, CLSCTX_INPROC_SERVER,
IID_INetCfg,
(void**)&pnc);
if (hr == S_OK) {
if (fGetWriteLock) {
//
// Get the locking reference
//
hr = pnc->QueryInterface(IID_INetCfgLock, (LPVOID *)&pncLock);
if (hr == S_OK) {
//
// Attempt to lock the INetCfg for read/write
//
hr = pncLock->AcquireWriteLock(LOCK_TIME_OUT,
lpszAppName,
lpszLockedBy);
if (hr == S_FALSE) {
hr = NETCFG_E_NO_WRITE_LOCK;
}
}
}
if (hr == S_OK) {
//
// Initialize the INetCfg object.
//
hr = pnc->Initialize(NULL);
if (hr == S_OK) {
*ppnc = pnc;
pnc->AddRef();
}
else {
//
// Initialize failed, if obtained lock, release it
//
if (pncLock) {
pncLock->ReleaseWriteLock();
}
}
}
ReleaseRef(pncLock);
ReleaseRef(pnc);
}
//
// In case of error, uninitialize COM.
//
if (hr != S_OK) {
CoUninitialize();
}
}
return hr;
}
