PROP_ENTRY_INTERFACE_CALLBACK_EX

Article
12/01/2015

Lets you specify a particular IID if your object supports multiple dispatch interfaces. Resembles PROP_ENTRY_INTERFACE_CALLBACK.

Syntax

PROP_ENTRY_INTERFACE_CALLBACK_EX(
   szDesc,
   dispid,
   clsid,
   iidDispatch,
   pfnFunc,
   vt
)

Parameters

[in] szDesc
The property description.
[in] dispid
The DISPID of the property.
[in] clsid
The CLSID of the associated property page. Use the special value CLSID_NULL for a property that does not have an associated property page.
[in] iidDispatch
The IID of the dispatch interface that defines the property.
[in]pfnFunc
The callback function that controls data during the loading process.
[in] vt
The type of the property.

Remarks

Include this macro to give an application more control over the IPersistStreamInitImpl::Load process. The callback function pfnFunc is called when IPersistStreamInitImpl::Load is retrieving data from a non-trusted stream. The callback function filters the data and controls which objects are loaded.

This macro only applies if IPersistStreamInitImpl is a base class and the class is advertised as safe for initialization. Otherwise, you should not use this macro.

This macro is only valid if vt is VT_DISPATCH or VT_UNKNOWN. Passing in a different value for vt to this macro will cause a compilation error. For any other value of vt, use PROP_ENTRY_TYPE_EX.

The BEGIN_PROP_MAP macro marks the beginning of the property map; the END_PROP_MAP macro marks the end.

If you are creating a web control that needs to be initialized, you should use the IPersistPropertyBagImpl Class instead of IPersistStreamInitImpl to initialize properties. IPersistStreamInitImpl possess a greater risk in binary format than IPersistPropertyBagImpl.

Example

See the example for BEGIN_PROP_MAP.

Requirements

Header: atlcom.h

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