Category of alert to unregister.
This value can be the core alert category or an extended alert category
as defined below:
PRTALERT_CATEGORY_ALL - 0x00000000
Unregister for
all alerts for the given alert handle. This will remove registration for
all printer ports (even remote ones) for the alert handle.
PRTALERT_CATEGORY_ALL_CORE
- 0x00000002
Unregister for all core alerts for
the port.
PRTALERT_CATEGORY_ALL_EXT - 0x00000003
Unregister for all extended alerts for the port.
PRTALERT_CATEGORY_CORE - 0x00000001
Core
alert category. This will remove registration for only those core alerts
whose bits are set in ulType for the port.
PRTALERT_CATEGORY_EXT_MAX
- 0x0000DFFF
End of the extended alert categories.
PRTALERT_CATEGORY_EXTENDED - 0x0000D000
Beginning
of the extended alert categories. Protocol converters should limit the category
range to between 0x0000D000 and 0x0000DFFFF.
If
the protocol converter does not support the given category, ERROR_INVALID_CATEGORY(117)
is returned.