IPersistMemory interface

Saves and loads objects from a stream.

Members

The IPersistMemory interface inherits from IPersist. IPersistMemory also has these types of members:

• Methods

Methods

The IPersistMemory interface has these methods.

Method	Description
GetSizeMax	Returns the size, in bytes, of the stream required to save the object.
InitNew	Initializes the object to a default state.
IsDirty	Checks the object for changes since it was last saved.
Load	Instructs the object to load its persistent data from memory.
Save	Instructs the object to save its persistent data to memory.

 

Remarks

The IPersistMemory interface operates the same as the interface; except that IPersistMemory allows the caller to provide a fixed-size memory block that is identified with a void *, and IPersistStreamInit uses an arbitrarily expandable IStream.

The cbSize argument to Load and Save indicates the amount of memory accessible through the pvMem pointer.

The IsDirty member, the GetSizeMax member, and the InitNew member are semantically and syntactically identical to those members in the IPersistStreamInit interface.

Requirements

Minimum supported client	Windows XP
Minimum supported server	Windows 2000 Server
Header	Ocidl.h
IDL	Ocidl.idl