Compaq iPAQ h3760 Datenblatt PDF herunterladen (Seite 17)

ENEE408G Fall 2003 (Update 09/23/2003)

Mobile Computing and Pocket PC Programming

If Err.Number <> 0 Then

MsgBox "Error:" & Err.Number & vbCrLf & Err.Description

Else

txtOutput.Text = sRecieveDate

WinSock1.Close

End If

End Sub

We set the Winsock1.RemoteHost as the server’s name

and RemotePort as the

default port 80 for HTTP. Winsock1.Connect sets up a connection between two

devices. If the connection is successfully established, the client and server can

transfer data to each other through Winsock1.SendData and Winsock1.Getdata. If

other device sends data to Pocket PC, it will trigger the Winsock1_DataArrival

and we will be able to deal with the incoming data. As shown above, we use On

Error Resume Next to catch any run time error. The Err object contains the

information about the error.

(4) Make sure the http server is working and put a text file in the www root directory,

so that we can run a test by setting the server name and the file we want to get.

The left figure below shows the program interface. After requesting, we get the

file in the txtOutput Window shown in the right figure below.

7. Windows CE API

(a) In addition to the ActiveX controls, we can extend the ability of eMbedded Visual

Basic by calling procedures included in the Windows CE API (Application

Programming Interface). The Windows CE API can be regarded as a subset of the

In this case, it’s the machine we used with eVB. Make sure there exists an http server inside the machine

If there is no http server inside your machine, you can download the freeware “Lil’ HTTP server” from

http://www.summitcn.com/

and install it. Set the port, IP and server name and then start it.

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Compaq iPAQ h3760 Datenblatt Seite 17