PSPropertyBag_ReadUnknown function (propsys.h)
Reads a given property of an unknown data value in a property bag.
Syntax
PSSTDAPI PSPropertyBag_ReadUnknown(
[in] IPropertyBag *propBag,
[in] LPCWSTR propName,
[in] REFIID riid,
[out] void **ppv
);
Parameters
[in] propBag
Type: IPropertyBag*
A pointer to an IPropertyBag object, that represents the property bag in which the property is stored.
[in] propName
Type: LPCWSTR
A pointer to a null-terminated property name string.
[in] riid
Type: REFIID
A reference to the IID of the interface to retrieve through ppv. This interface IID should be IPropertyBag or an interface derived from IPropertyBag.
[out] ppv
Type: void**
When this method returns successfully, contains the interface pointer requested in riid. This is typically riid.
Return value
Type: HRESULT
If this function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Remarks
IPropertyBag and IPersistPropertyBag optimize Save As Text functionality. IPropertyBag and IPropertyBag2 provide an object with a property bag in which the object can save its properties persistently. IPropertyBag2 allows the object to obtain type information for each property: IPropertyBag2::Read causes one or more properties to be read from the property bag, and IPropertyBag2::Write causes one or more properties to be saved into the property bag.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7 [desktop apps only] |
| Minimum supported server | Windows Server 2008 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | propsys.h |
| Library | Propsys.lib |
| DLL | Propsys.dll (version 6.0 or later) |