Android Question Where to get B4A callback functions' documentation?

I cannot find certain callback functions documentation and the example as below,

Sub Process_Globals
Dim Socket1 As Socket
End Sub

Sub Activity_Create(FirstTime As Boolean)
Socket1.Initialize("Socket1")
End Sub

Sub SocketClient_Connected (Successful As Boolean)
End Sub

Could you tell me where to get the callback functions' documentation such as 'SocketClient_Connected'?