NullValueCallback
introduction
Null value callback
Returned template
void NullValueCallback(int code, string desc, string user_data);
Return value details
| name | type | description |
|---|---|---|
| code | int | Result error code: Error Codes |
| desc | string | The description of the error. |
| user_data | string | User-defined data transfered by ImSDK without any processing |