wiasReadPropGuid function (wiamdef.h)
The wiasReadPropGuid function retrieves a GUID property value from a WIA item.
Syntax
HRESULT wiasReadPropGuid(
[in] BYTE *pWiasContext,
PROPID propid,
[out] GUID *pguidVal,
[out, optional] GUID *pguidValOld,
BOOL bMustExist
);
Parameters
[in] pWiasContext
Pointer to a WIA item context.
propid
Specifies the property identifier.
[out] pguidVal
Pointer to a memory location that receives the GUID property value.
[out, optional] pguidValOld
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).
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | wiamdef.h (include Wiamdef.h) |
| Library | Wiaservc.lib |
| DLL | Wiaservc.dll |