const uint CM_GET_DEVICE_INTERFACE_LIST_ALL_DEVICES = 0x1;

Const CM_GET_DEVICE_INTERFACE_LIST_ALL_DEVICES As UInt32 = &h1

const uint CM_GET_DEVICE_INTERFACE_LIST_ALL_DEVICES = 0x1;

const uint CM_GET_DEVICE_INTERFACE_LIST_PRESENT = 0x0;

Const CM_GET_DEVICE_INTERFACE_LIST_PRESENT As UInt32 = &h0

const uint CM_GET_DEVICE_INTERFACE_LIST_PRESENT = 0x0;

Const CM_GET_DEVICE_INTERFACE_LIST_PRESENT As UInt32 = &h0

static extern uint CM_Get_Device_Interface_List(ref Guid interfaceClassGuid, string deviceID, char[] buffer, uint bufferLength, uint flags);

const uint CM_GET_DEVICE_INTERFACE_LIST_PRESENT = 0x0;

  var cr = CM_Get_Device_Interface_List_Size(out uint size, ref GUID_DEVINTERFACE_COMPORT, null, CM_GET_DEVICE_INTERFACE_LIST_PRESENT);        

    cr = CM_Get_Device_Interface_List(ref GUID_DEVINTERFACE_COMPORT, null, data, (uint)data.Length, CM_GET_DEVICE_INTERFACE_LIST_PRESENT);

static extern uint CM_Get_Device_Interface_List_Size(out uint size, ref Guid interfaceClassGuid, string deviceID, uint flags);