wiasGetChangedValueFloat function (wiamdef.h)
The wiasGetChangedValueFloat function determines whether a property with a floating-point value has been changed by an application.
Syntax
HRESULT wiasGetChangedValueFloat(
[in] BYTE *pWiasContext,
[in] WIA_PROPERTY_CONTEXT *pContext,
BOOL bNoValidation,
PROPID propID,
WIAS_CHANGED_VALUE_INFO *pInfo
);
Parameters
[in] pWiasContext
Pointer to a WIA item context.
[in] pContext
Pointer to a WIA_PROPERTY_CONTEXT structure that contains the current property context.
bNoValidation
Indicates 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.
propID
Specifies the property identifier of the property being tested.
pInfo
Pointer to a WIAS_CHANGED_VALUE_INFO structure that contains the current and previous values of the property.
Return value
On success, the function returns S_OK.
If the function fails, it returns a standard COM error or one of the WIA error codes.
Remarks
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.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | wiamdef.h (include Wiamdef.h) |
| Library | Wiaservc.lib |
| DLL | Wiaservc.dll |