wiasReadPropLong - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// wiamdef.h

HRESULT wiasReadPropLong(
  [in]            BYTE   *pWiasContext,
                  PROPID propid,
  [out]           LONG   *plVal,
  [out, optional] LONG   *plValOld,
                  BOOL   bMustExist
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-wiamdef-wiasreadproplong)

wiasReadPropLong function

Description

The wiasReadPropLong function retrieves a long integer property value from a WIA item.

Parameters

pWiasContext [in]

Pointer to a WIA item context.

propid

Specifies the property identifier.

plVal [out]

Pointer to a memory location that receives the value of the property.

plValOld [out, optional]

Pointer to a memory location that receives the property's previous value. If this information is not needed, set this parameter to NULL.

bMustExist

Indicates whether the property must exist. If set to TRUE, the property must exist, if set to FALSE, the property does not have to exist.

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_XXX errors (described in the Microsoft Windows SDK documentation).

See also

wiasReadPropBin

wiasReadPropFloat

wiasReadPropGuid

wiasReadPropStr

wiasWritePropLong

View the official Windows Driver Kit DDI reference

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