wiasGetChangedValueStr - NtDoc
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headers
// wiamdef.h
HRESULT wiasGetChangedValueStr(
[in] BYTE *pWiasContext,
[in] WIA_PROPERTY_CONTEXT *pContext,
BOOL bNoValidation,
PROPID propID,
WIAS_CHANGED_VALUE_INFO *pInfo
);
View the official Windows Driver Kit DDI referenceNo description available.
The wiasGetChangedValueStr function determines whether a property with a string value has been changed by an application.
pWiasContext [in]Pointer to a WIA item context.
pContext [in]Pointer to a WIA_PROPERTY_CONTEXT structure that contains the current property context.
bNoValidationIndicates whether the property's current value should be validated against its set of valid values. If this parameter is set to TRUE, the function does not perform validation on the property. If it is FALSE, the function performs data validation.
propIDSpecifies the property identifier of the property being tested.
pInfoPointer to a WIAS_CHANGED_VALUE_INFO structure that contains the current and previous values of the property.
On success, the function returns S_OK.
If the function fails, it returns a standard COM error or one of the WIA error codes.
The driver should validate the property only after the driver has updated the values of the property. The driver updates the values as a result of property changes requested by the application.