# SIMCONNECT_CLIENT_DATA_PERIOD<no value>
The **SIMCONNECT\_CLIENT\_DATA\_PERIOD** enumeration type is used with the [SimConnect\_RequestClientData](../events-and-data/simconnect-requestclientdata/) call to specify how often data is to be sent to the client.

 

 

##### Syntax

``` cpp
enum SIMCONNECT_CLIENT_DATA_PERIOD{
    SIMCONNECT_PERIOD_NEVER,
    SIMCONNECT_PERIOD_ONCE,
    SIMCONNECT_PERIOD_VISUAL_FRAME,
    SIMCONNECT_PERIOD_ON_SET,
    SIMCONNECT_PERIOD_SECOND,
    };
```

 

##### Members

{{< table-wrapper >}}

| Member                           | Description                                                                                                                                                                                              |
|----------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `SIMCONNECT_PERIOD_NEVER`        | Specifies that the data is not to be sent.                                                                                                                                                               |
| `SIMCONNECT_PERIOD_ONCE`         | Specifies that the data should be sent once only. Note that this is not an efficient way of receiving data frequently, use one of the other periods if there is a regular frequency to the data request. |
| `SIMCONNECT_PERIOD_VISUAL_FRAME` | Specifies that the data should be sent every visual (rendered) frame.                                                                                                                                    |
| `SIMCONNECT_PERIOD_ON_SET`       | Specifies that the data should be sent whenever it is set.                                                                                                                                               |
| `SIMCONNECT_PERIOD_SECOND`       | Specifies that the data should be sent once every second.                                                                                                                                                |

{{< /table-wrapper >}}


 

##### Remarks

There is no limit to the number of system events that can be subscribed to, but use this function to improve performance when a system event notification is no longer needed.