Merge pull request #2078 from iPhilip/patch-63

Update nf-wlanapi-wlanscan.md

Author: stevewhims

sdk-api-src/content/wlanapi/nf-wlanapi-wlanscan.md

@@ -71,7 +71,7 @@ The GUID of the interface to be queried.
 
 ### -param pDot11Ssid [in, optional]
 
-A pointer to a <a href="/windows/desktop/NativeWiFi/dot11-ssid">DOT11_SSID</a> structure that specifies the SSID of the network to be scanned. This parameter is optional. When set to <b>NULL</b>, the returned list contains all available networks. 
+A pointer to a <a href="/windows/desktop/NativeWiFi/dot11-ssid">DOT11_SSID</a> structure that specifies the SSID of the network to be scanned. This parameter may be <b>NULL</b>. 
 <b>Windows XP with SP3 and Wireless LAN API for Windows XP with SP2:  </b>This parameter must be <b>NULL</b>.
 
 ### -param pIeData [in, optional]
@@ -202,4 +202,4 @@ Since it becomes more difficult for a wireless interface to send and receive dat
 
 
 
-<a href="/windows/desktop/api/wlanapi/nf-wlanapi-wlansetpsdiedatalist">WlanSetPsdIEDataList</a>
+<a href="/windows/desktop/api/wlanapi/nf-wlanapi-wlansetpsdiedatalist">WlanSetPsdIEDataList</a>