IFillLockBytes

The IFillLockBytes interface enables downloading code to write data asynchronously to a structured storage byte array. When the downloading code has new data available, it calls IFillLockBytes::FillAppendIL6N.0 or IFillLockBytes::FillAt to write the data to the byte array. An application attempting to access this data, through calls to the ILockBytes5AUHTW6 interface, can do so even as the downloader continues to make calls to IFillLockBytes. If the application attempts to access data that has not already been downloaded through a call to IFillLockBytes, then ILockBytes returns a new error, E_PENDING.

When to Implement

You normally would not implement this interface. A system developer that wants to provide asynchronous storage for a protocol other than http might implement IFillLockBytes as part of the transport layer.

When to Use

You normally would not call this interface. Monikers or other downloading code that provide asynchronous storage use this interface to fill the byte array as data becomes available.

Methods in VTable Order

IUnknown Methods	Description
QueryInterface	Returns pointers to supported interfaces.
AddRef	Increments reference count.
Release	Decrements reference count.

IFillLockBytes Methods	Description
FillAppendIL6N.0	Writes a new block of bytes to end of byte array.
FillAt1A73ZJZ	Writes a new block of bytes to specified location in byte array.
SetFillSize56VJZC	Sets expected size of byte array.
Terminate1AMJ_DE	Notifies byte array wrapper of successful or unsuccessful termination of download.

Also see IBinding and IBindStatusCallback in the ActiveX SDK.