public WLAN_CONNECTION_MODE wlanConnectionMode;

     Public wlanConnectionMode As WLAN_CONNECTION_MODE

        public WLAN_CONNECTION_MODE wlanConnectionMode;

The rationale behind the change in the history for this is because is that he/she wanted to "unmarshal". However, in functions like WlanConnect(), it is used as an "input". So, it needs to be marshaled. Then I believe they should be IntPtr.

public static extern uint WlanConnect(IntPtr hClientHandle,ref Guid pInterfaceGuid,ref WLAN_CONNECTION_PARAMETERS pConnectionParameters,IntPtr pReserved);

Declare Function WlanConnect Lib "wlanapi.dll" (ByVal hClientHandle As IntPtr, _

WLAN_CONNECTION_PARAMETERS wlanConnectionParameters = new WLAN_CONNECTION_PARAMETERS();

wlanConnectionParameters.dot11BssType = DOT11_BSS_TYPE.dot11_BSS_type_any;

wlanConnectionParameters.dwFlags = 0;

wlanConnectionParameters.strProfile = "dlink";

wlanConnectionParameters.wlanConnectionMode = WLAN_CONNECTION_MODE.wlan_connection_mode_profile;

WlanConnect(ClientHandle,ref pInterfaceGuid,ref wlanConnectionParameters ,new IntPtr());

Dim wlanConnectionParameters As New WLAN_CONNECTION_PARAMETERS

wlanConnectionParameters.dot11BssType = DOT11_BSS_TYPE.dot11_BSS_type_any

wlanConnectionParameters.dwFlags = 0

wlanConnectionParameters.strProfile = "dlink"

wlanConnectionParameters.wlanConnectionMode = WLAN_CONNECTION_MODE.wlan_connection_mode_profile

WlanConnect(ClientHandle, pInterfaceGuid, wlanConnectionParameters, IntPtr.Zero)