volume control(Windows.Media.Devices.CallControl.GetDefault)

Question

Hi everyone,I created a metra app using C#. Then I want use the "Windows.Media.Devices.CallControl.GetDefault()" funtion to get a CallControl object.

I think the CallControl object can set\get the volume value, but then call CallControl.GetDefault, throw an exception:

"An exception of type 'System.Runtime.InteropServices.COMException' occurred in tabtest.exe but was not handled in user code

Additional information: Invalid value for registry (Exception from HRESULT: 0x80040153 (REGDB_E_INVALIDVALUE))"

How can I do?

Answer 1

Hi Damon,

Do you have a bluetooth device connected on your system?  There is a known issue in the Developer Preview where CallControl.GetDefault will raise an expectation if there isn't a device available and connected.

--Rob

Answer 2

Hi Rob,

My BT is disconnected.

But,msdn says:

This method may return a NULL pointer if the device doesn't support this functionality.

Thanks.

Answer 3

Hi ,I want to know how to connect a bluetooth device ?

who can give me a hand?

thanks