Network PlugIn

Network PlugIn

The Network PlugIn is a powerful add-on to Instant.EXE. It allows you to create TCP and UDP connections and handle them how ever you want. You should have acquired basic knowledge of Instant.EXE before diving into network programming. If you don't feel comfortable yet, take a look at the Instant.EXE beginner's guide!

Additionaly equipped with the Internet PlugIn you can easily create client/server applications to fit your needs or write your very own client or server for existing protocols. An entire webserver has been created with Instant.EXE, and nobody is going to stop you from writing your very own mail-client or the like.

| Download | Purchase | Internet PlugIn | Database PlugIn

Now for a small example. Networks consist of millions of computers. Most operating systems contain a command named 'ping' that you can use to check if a certain computer is running and responding. The Network PlugIn makes the 'ping'-command available within Instant.EXE (it does far more than that, of course). In fact, you can ping a host by simply querying the variable [iX.Network.Ping [HOSTNAME]]. If the host responds to the ping, a 1 is returned. A 0 is returned if the host is not reachable and a -1 signals that some error occured (e.g. the hostname could not be resolved).

Based on this one variable, we can write a small script that can ping a host the user enters:

*** Set up GUI and wait for event
Display Window 'Instant.EXE 3.0 Ping-Demo' (X=55, Y=37, W=50, H=50, Inner size, Max. enabled)
Display Control Label: 'Domainname or IP-Address:' (ID='lblUrl', X=5, Y=5, W=40, H=5)
Display Control Text box: (ID='inpAddress', X=5, Y=10, W=40, H=5)
Display Control 'Ping!' (ID='btnPing', X=5, Y=20, W=40, H=7)
Display Control Label: (ID='lblResult', X=5, Y=30, W=40, H=15, framed)
Wait infinite...

*** Try to ping the host and display result
:: iX_Display_Control(btnPing)
*** Host is reachable
If True: '[iX.Network.Ping [iX.Display.Control(inpAddress).Text]]=1'
Set in [iX.Display().Control(lblResult)]: 'Host [iX.Display().Control(lblAddress).Text] is available from this machine!'
*** Host is unreachable
Else if True: '[iX.Network.Ping [iX.Display().Control(inpAddress)]]=0'
Set in [iX.Display().Control(lblResult)]: 'Host [iX.Display().Control(inpAddress)] is not available from this machine!'
*** An error (probably DNS) occured
Else if True: '[iX.Network.Ping [iX.Display().Control(inpAddress)]]=-1'
Set in [iX.Display().Control(lblResult)]: 'Address [iX.Display().Control(inpAddress)] could not be resolved!'
End If
Return

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