WinbioOpensession returns E_ACCESSDENIED?

Question

I am programming in VS2010 and Windows 7.

I am calling the WinBioOpenSession function from winbio.h

This is my code:

WINBIO_SESSION_HANDLE sessionHandle = NULL;

hr = WinBioOpenSession( 
            WINBIO_TYPE_FINGERPRINT,    
            WINBIO_POOL_SYSTEM,         
            WINBIO_FLAG_RAW,            
            NULL,                      
            0,                          
            WINBIO_DB_DEFAULT,          
            &sessionHandle             
            );

hr returns E_ACCESSDENIED return code?

How can I resolve this?

Answer 1

The problem is that you didn't check the biometric logon option. Go to the Biometric option of the Control Panel and enable the biometric logon option.

Answer 2

Run the Visual Studio as an Administrator.