wiasReadPropGuid - NtDoc

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

HRESULT wiasReadPropGuid(
  [in]            BYTE   *pWiasContext,
                  PROPID propid,
  [out]           GUID   *pguidVal,
  [out, optional] GUID   *pguidValOld,
                  BOOL   bMustExist
);
View the official Windows Driver Kit DDI reference

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

Description

The wiasReadPropGuid function retrieves a GUID property value from a WIA item.

Parameters

pWiasContext [in]

Pointer to a WIA item context.

propid

Specifies the property identifier.

pguidVal [out]

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

pguidValOld [out, optional]

Pointer to a memory location that receives the previous value of the GUID property data. If this information is not needed, this parameter can be set 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

wiasReadPropLong

wiasReadPropStr

wiasWritePropGuid

View the official Windows Driver Kit DDI reference

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