What's New in Services for Windows 7
Windows 7 and Windows Server 2008 R2 include the following new and updated programming elements for services.
New Capabilities
A service can register to be started or stopped when a trigger event occurs. This eliminates the need for services to start when the system starts, or for services to poll or actively wait for an event; a service can start when it is needed, instead of starting automatically whether or not there is work to do. For more information, see Service Trigger Events.
Updated Functions
| Function | Description |
|---|---|
| ChangeServiceConfig |
Changes the configuration parameters of a service. This function supports managed service accounts and virtual accounts. For more information, see Service Accounts Step-by-Step Guide. |
| ChangeServiceConfig2 |
Changes the optional configuration parameters of a service. This function supports new configuration information levels for processor groups and service trigger events. |
| CreateService |
Creates a service object and adds it to the specified service control manager database. This function supports managed service accounts and virtual accounts. For more information, see Service Accounts Step-by-Step Guide. |
| HandlerEx |
An application-defined callback function used with the RegisterServiceCtrlHandlerEx function. This callback function supports new extended control codes for system time changes and service trigger events. |
| QueryServiceConfig2 |
Retrieves the optional configuration parameters of a service. This function supports new configuration information levels for processor groups and service trigger events. |
| SetServiceStatus |
Updates the service control manager's status information for the calling service. This function supports new extended control codes for system time changes and service trigger events. |
New Structures
| Structure | Description |
|---|---|
| SERVICE_TIMECHANGE_INFO |
Contains system time change settings. |
| SERVICE_TRIGGER |
Represents a service trigger event. |
| SERVICE_TRIGGER_INFO |
Contains trigger event information for a service. |
| SERVICE_TRIGGER_SPECIFIC_DATA_ITEM |
Contains trigger-specific data for a service trigger event. |