IMailMsgPropertyStream::StartWriteBlocks

[This is preliminary documentation and subject to change.]

Start a block write transaction.

HRESULT StartWriteBlocks(
   [in] IMailMsgProperties *pMsg,
   [in] DWORD dwBlocksToWrite,
   [in] DWORD dwTotalBytesToWrite
);

pMsg

The interface on a MailMsg object for which the block-write transaction is to begin.

dwBlocksToWrite

Specifies the number of blocks that will be written before EndWriteBlocks is called.

dwTotalBytesToWrite

Specifies the sum of the block sizes in bytes that will be written during the transaction before EndWriteBlocks is called.

Return Values

Remarks

The store driver infers which property stream the method applies to using the MailMsg object's IUnknown address, which uniquely identifies the object in memory (COM Identity rules).

See Also

IMailMsgPropertyStream.WriteBlocks

IMailMsgPropertyStream.EndWriteBlocks