Client Application Callback Functions
The Windows Biometric Framework supports two types of callback signatures. Beginning with Windows 8, the following callback is supported. We recommend that you implement this callback for all new applications. This callback cannot, however, be used in Windows 7.
| Callback | Description |
|---|---|
| PWINBIO_ASYNC_COMPLETION_CALLBACK |
Notifies the client application that an asynchronous operation started by using WinBioAsyncOpenSession or WinBioAsyncOpenFramework has completed. |
The following callback functions were introduced in Windows 7. We recommend that you do not implement them for new applications that target Windows 8 and later operating systems.
| Callback | Description |
|---|---|
| PWINBIO_CAPTURE_CALLBACK |
Returns results from the asynchronous WinBioCaptureSampleWithCallback function. |
| PWINBIO_ENROLL_CAPTURE_CALLBACK |
Returns results from the asynchronous WinBioEnrollCaptureWithCallback function. |
| PWINBIO_EVENT_CALLBACK |
Returns results from the asynchronous WinBioRegisterEventMonitor function. |
| PWINBIO_IDENTIFY_CALLBACK |
Returns results from the asynchronous WinBioIdentifyWithCallback function. |
| PWINBIO_LOCATE_SENSOR_CALLBACK |
Returns results from the asynchronous WinBioLocateSensorWithCallback function. |
| PWINBIO_VERIFY_CALLBACK |
Returns results from the asynchronous WinBioVerifyWithCallback function. |