# Windows TAP - emllTap

The parameters to the Windows TAP Real-time Ethernet Driver are setup-specific. The function `CreateLinkParmsFromCmdLineTap()` in [`EcSelectLinkLayer.cpp`](_downloads/bf62c71a4a7e317930818b9da4a9815c/EcSelectLinkLayer.cpp) demonstrates how to initialize the Real-time Ethernet Driver instance.

### struct EC_T_LINK_PARMS_TAP

### Public Members

### [EC_T_LINK_PARMS](emll_init.html.md#_CPPv415EC_T_LINK_PARMS) linkParms

Common link parameters. Signature must be set to EC_LINK_PARMS_SIGNATURE_TAP. 

### [EC_T_CHAR](api.html.md#_CPPv49EC_T_CHAR) szAdapterName[EC_TAP_ADAPTER_NAME_SIZE]

Native tap device name, e.g. “tap0” (zero terminated) 

### [EC_T_CHAR](api.html.md#_CPPv49EC_T_CHAR) szAdapterGuid[EC_TAP_ADAPTER_GUID_SIZE]

GUID of virtual interface to connect (zero terminated) 

### [EC_T_BYTE](api.html.md#_CPPv49EC_T_BYTE) abyMac[6]

MAC address 

### [EC_T_DWORD](api.html.md#_CPPv410EC_T_DWORD) dwRxBufferCnt

Frame buffer count for IST 

The adapter must be manually installed as described in the OpenVPN’s Windows TAP-driver manual, see [https://community.openvpn.net/openvpn/wiki/GettingTapWindows](https://community.openvpn.net/openvpn/wiki/GettingTapWindows) .

While EC-Simulator is connected to the adapter using emllTap, the MainDevice can use it with e.g. emllNdis.