~~NOTOC~~
[[zone_control_api]] > [[BS2_GetAllAntiPassbackZone]]

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===== BS2_GetAllAntiPassbackZone =====
Retrieves all Anti Passback zones.
==== Declaration ====
<code cpp>
#include "BS_API.h"

int BS2_GetAllAntiPassbackZone(void* context, uint32_t deviceId, BS2AntiPassbackZone** zoneObj, uint32_t* numZone);
</code>

<callout type="info">
[[zone control api#BS2AntiPassbackZone|See BS2AntiPassbackZone Structure]]
</callout>
==== Parameter ====
  * [In] ''//context//'' : Context
  * [In] ''//deviceId//'' : Device ID
  * [Out] ''//zoneObj//'' : Anti Passback zone list pointer
  * [Out] ''//numZone//'' : Number of Anti Passback zones
<WRAP indent>
<WRAP info 70%>
**NOTE**\\
The zoneObj variable needs to return the memory to the system by the [[BS2_ReleaseObject]] function after being used. 
</WRAP>
</WRAP>
==== Return Value ====
If successfully done, ''BS_SDK_SUCCESS'' will be returned. \\
If there is an error, the corresponding error code will be returned.
==== See Also ====
[[BS2_GetAntiPassbackZone]]\\ [[BS2_SetAntiPassbackZone]]\\ [[BS2_RemoveAntiPassbackZone]]\\ [[BS2_RemoveAllAntiPassbackZone]]