Update README.md

README.md

@@ -54,7 +54,7 @@ global Interception := AHI.GetInstance()
 ``` 
 
 `AHI` is an AHK class that makes it easy to interact with the AutoHotInterception DLL. For example, it wraps `GetDeviceList()` to make it return a normal AHK array. Most of the time you will not need it.  
-For advanced users, if you wish to directly communicate with the AHI DLL, you can call `AHI.Instance` instead of `AHI` for most functions (eg sending of synthesized input).  
+For advanced users, if you wish to directly communicate with the AHI DLL (eg for best possible performance), you can call `AHI.Instance` instead of `AHI` for most functions (eg when sending of synthesized input using `SendMouseMove`).  
 
 ## Finding Device IDs  
 ### Finding a specific device