IMSCSDBStorage_3_0::LookupMultipleData

Article
06/07/2013

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Use this method to retrieve multiple results from the database table. If the data is found, this method creates a SimpleList object that contains OrderForm or Dictionary objects, depending on the vtProgID parameter passed to the InitStorage method.

Definition

HRESULT IMSCSDBStorage_3_0::LookupMultipleData(VARIANTvtReserved,VARIANT*pvtKeys,VARIANT*pvtValues,VARIANT*pvtRet);

Parameters

vtReserved

[in] A VARIANT reserved for future use. The LookupData method ignores any value stored in this parameter.

pvtKeys

[in]A pointer to the VARIANT that identifies the columns in which to search for the data. This VARIANT can be either a SimpleList object or a SAFEARRAY.

pvtValues

[in] A pointer to the VARIANT that identifies the values for which to search. This parameter can be either a SimpleList object or a SAFEARRAY.

pvtRet

[out, retval] A pointer to a VARIANT used to return the result of the lookup. This VARIANT references an IDispatch interface on a SimpleList object that consists of one or more Dictionary objects, one for each row of data returned. If the method fails, this parameter is set to NULL.

Return Values

This method returns an HRESULT indicating whether or not it completed successfully. See the Error Values section for more details.

Error Values

This method returns S_OK (0x00000000) to indicate success and standard COM HRESULT error values to indicate failure. For more information about standard COM errors, see Standard COM Errors. Additional information may be available using the global Err object, which can be accessed using the API function GetErrorInfo. In particular, the GetDescription method of the IErrorInfo interface may return a text description of the error.

Remarks

The pvtRet parameter points to valid data only if the method returns successfully.

For more information about memory ownership issues related to COM property and method parameters, see Managing COM Parameter Memory.