HRESULT
ExecuteMethodsInClass(
__in IWbemServices* WbemServices,
__in_opt PWCHAR UserId,
__in_opt PWCHAR Password,
__in_opt PWCHAR DomainName
)
/*++
Routine Description:
This routine enumerates the instances of the Toaster method class and
executes the methods in the class for each instance.
Arguments:
WbemServices - Pointer to the WBEM services interface used for accessing
the WMI services.
UserId - Pointer to the user id information or NULL.
Password - Pointer to password or NULL. If the user id is not specified,
this parameter is ignored.
DomainName - Pointer to domain name or NULL. If the user id is not specified,
this parameter is ignored.
Return Value:
HRESULT Status code.
--*/
{
HRESULT status = S_OK;
IEnumWbemClassObject* enumerator = NULL;
IWbemClassObject* classObj = NULL;
IWbemClassObject* instanceObj = NULL;
const BSTR className = SysAllocString(TOASTER_METHOD_CLASS);
VARIANT pathVariable;
_bstr_t instancePath;
ULONG nbrObjsSought = 1;
ULONG nbrObjsReturned;
//
// Create an Enumeration object to enumerate the instances of the given class.
//
status = WbemServices->CreateInstanceEnum(className,
WBEM_FLAG_SHALLOW | WBEM_FLAG_RETURN_IMMEDIATELY | WBEM_FLAG_FORWARD_ONLY,
NULL,
&enumerator);
if (FAILED(status)) {
goto exit;
}
//
// Set authentication information for the interface.
//
status = SetInterfaceSecurity(enumerator, UserId, Password, DomainName);
if (FAILED(status)) {
goto exit;
}
//
// Get the class object for the method definition.
//
status = WbemServices->GetObject(className, 0, NULL, &classObj, NULL);
if (FAILED(status)) {
goto exit;
}
do {
//
// Get the instance object for each instance of the class.
//
status = enumerator->Next(WBEM_INFINITE,
nbrObjsSought,
&instanceObj,
&nbrObjsReturned);
if (status == WBEM_S_FALSE) {
status = S_OK;
break;
}
if (FAILED(status)) {
if (status == WBEM_E_INVALID_CLASS) {
printf("ERROR: Toaster driver may not be active on the system.\n");
}
goto exit;
}
//
// To obtain the object path of the object for which the method has to be
// executed, query the "__PATH" property of the WMI instance object.
//
status = instanceObj->Get(_bstr_t(L"__PATH"), 0, &pathVariable, NULL, NULL);
if (FAILED(status)) {
goto exit;
}
instancePath = pathVariable.bstrVal;
instanceObj->Release();
instanceObj = NULL;
//
// Execute the methods in this instance of the class.
//
status = ExecuteMethod1InInstance(WbemServices, classObj, instancePath, IN_DATA1_VALUE);
if (FAILED(status)) {
goto exit;
}
status = ExecuteMethod2InInstance(WbemServices, classObj, instancePath, IN_DATA1_VALUE, IN_DATA2_VALUE);
if (FAILED(status)) {
goto exit;
}
status = ExecuteMethod3InInstance(WbemServices, classObj, instancePath, IN_DATA1_VALUE, IN_DATA2_VALUE);
if (FAILED(status)) {
goto exit;
}
} while (!FAILED(status));
exit:
if (className != NULL) {
SysFreeString(className);
}
if (classObj != NULL) {
classObj->Release();
}
if (enumerator != NULL) {
enumerator->Release();
}
if (instanceObj != NULL) {
instanceObj->Release();
}
return status;
}
HRESULT
GetAndSetValuesInClass(
_In_ IWbemServices* WbemServices,
_In_opt_ PWSTR UserId,
_In_opt_ PWSTR Password,
_In_opt_ PWSTR DomainName
)
/*++
Routine Description:
This routine enumerates the instances of the Toaster Device Information
class and gets/sets the value of one of its Properties.
Arguments:
WbemServices - Pointer to the WBEM services interface used for accessing
the WMI services.
UserId - Pointer to the user id information or NULL.
Password - Pointer to password or NULL. If the user id is not specified,
this parameter is ignored.
DomainName - Pointer to domain name or NULL. If the user id is not specified,
this parameter is ignored.
Return Value:
HRESULT Status code.
--*/
{
HRESULT status = S_OK;
IEnumWbemClassObject* enumerator = NULL;
IWbemClassObject* classObj = NULL;
IWbemClassObject* instanceObj = NULL;
const BSTR className = SysAllocString(TOASTER_DEVICE_INFO_CLASS);
VARIANT instProperty;
ULONG nbrObjsSought = 1;
ULONG nbrObjsReturned;
//
// Create an Enumeration object to enumerate the instances of the given class.
//
status = WbemServices->CreateInstanceEnum(className,
WBEM_FLAG_SHALLOW | WBEM_FLAG_RETURN_IMMEDIATELY | WBEM_FLAG_FORWARD_ONLY,
NULL,
&enumerator);
if (FAILED(status)) {
goto exit;
}
//
// Set authentication information for the interface.
//
status = SetInterfaceSecurity(enumerator, UserId, Password, DomainName);
if (FAILED(status)) {
goto exit;
}
do {
//
// Get the instance object for each instance of the class.
//
status = enumerator->Next(WBEM_INFINITE,
nbrObjsSought,
&instanceObj,
&nbrObjsReturned);
if (status == WBEM_S_FALSE) {
status = S_OK;
break;
}
if (FAILED(status)) {
if (status == WBEM_E_INVALID_CLASS) {
printf("ERROR: Toaster driver may not be active on the system.\n");
}
goto exit;
}
//
// To obtain the object path of the object for which the method has to be
// executed, query the "__PATH" property of the WMI instance object.
//
status = instanceObj->Get(_bstr_t(L"__PATH"), 0, &instProperty, 0, 0);
if (FAILED(status)) {
goto exit;
}
printf("\n");
printf("Instance Path .: %ws\n", (wchar_t*)instProperty.bstrVal);
//
// Get the current value of the DummyValue property.
//
status = instanceObj->Get(TOASTER_VAR1, 0, &instProperty, NULL, NULL);
if (FAILED(status)) {
goto exit;
}
printf(" Property ....: %ws\n", TOASTER_VAR1);
printf(" Old Value ...: %d\n", instProperty.lVal);
//
// Set a new value for the DummyValue property.
//
instProperty.lVal++;
status = instanceObj->Put(TOASTER_VAR1, 0, &instProperty, 0);
if (FAILED(status)) {
goto exit;
}
status = WbemServices->PutInstance(instanceObj,
WBEM_FLAG_UPDATE_ONLY,
NULL,
NULL);
if (FAILED(status)) {
goto exit;
}
status = instanceObj->Get(_bstr_t(TOASTER_VAR1), 0, &instProperty, NULL, NULL);
if (FAILED(status)) {
goto exit;
}
printf(" New Value ...: %d\n", instProperty.lVal);
instanceObj->Release();
instanceObj = NULL;
} while (!FAILED(status));
exit:
if (className != NULL) {
SysFreeString(className);
}
if (classObj != NULL) {
classObj->Release();
}
if (enumerator != NULL) {
enumerator->Release();
}
if (instanceObj != NULL) {
instanceObj->Release();
}
return status;
}
