| Platform SDK: SMTP Server Events |
[This is preliminary documentation and subject to change.]
Decrement the MailMsg object's usage count.
HRESULT ReleaseUsage();
| Value | Description |
|---|---|
| S_OK | Success. The usage count decremented from one to zero. |
| S_FALSE | Success. The usage count was greater than one. |
| E_FAIL | Failure. The usage count was negative. |
When the usage count is zero, the MailMsg object's resources are more likely to be released from memory.