Bluetooth communication from PC to mobile phone, use laptop speaker and mic during voice call

Question

I am using 32feet.net library for connecting with Bluetooth mobile phone. I have successfully discovered devices, successfully paired with device. I have successfully made a call using AT command with the help of Bluetooth dial with 32feet.net and c#

I want to use the speaker and mic of laptop during the voice call going on the mobile phone.

My C# code for dialing a call is

BluetoothEndPoint bep = new BluetoothEndPoint(phone.DeviceAddress,BluetoothService.Handsfree);

cli = new BluetoothClient();

cli.Connect(bep);
peerStream = cli.GetStream();
peerStream = Listofdevices.cli.GetStream();
String dialCmd4 = "ATD"+txtdialer.Text+";\r\n";
Byte[] dcB = System.Text.Encoding.ASCII.GetBytes(dialCmd4);
Listofdevices.peerStream.Write(dcB, 0, dcB.Length);

Byte[] sRes = new Byte[200];
peerStream.Read(sRes, 0, 199);

How can I use my speaker and mic of laptop for communication on the call?