IFillLockBytes
A version of this page is also available for
4/8/2010
This 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::FillAppend or IFillLockBytes::FillAt to write the data to the byte array.
An application attempting to access this data through calls to the ILockBytes interface can do so even as the downloader continues to make calls to IFillLockBytes.
If the application attempts to access data that has not been downloaded through a call to IFillLockBytes, ILockBytes returns a new error, E_PENDING.
When to Implement
You typically 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 typically 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 method | Description |
|---|---|
Returns pointers to supported interfaces. |
|
Increments the reference count. |
|
Decrements the reference count. |
| Method | Description |
|---|---|
Writes a new block of bytes to end of byte array. |
|
Writes a new block of bytes to specified location in byte array. |
|
Sets expected size of byte array. |
|
Notifies byte array wrapper of successful or unsuccessful termination of download. |
Remarks
To determine whether the platform supports this interface, see Determining Supported COM APIs.
Requirements
| Header | objidl.h, objidl.idl |
| Library | ole32.lib, uuid.lib |
| Windows Embedded CE | Windows CE 3.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
See Also
Reference
IFillLockBytes Implementation
IConnectionPoint
IConnectionPointContainer
ILockBytes
IStorage
IStream