I want to summarize the role of function keys in Windows Mobile, former Pocket PC, as I got several questions each week on how to use or enable Function keys in this or that application.
Here is a simple information about how function keys work in Windows Mobile.
Continue reading ‘Windows Mobile – the no-go world of Function Keys’ »
This is the description of my btPrint demo app to print demo files to portable bluetooth label/receipt printers. I already did the same app for android and now wanted to do the same for windows phone 8.
The app starts with the main screen where you select a bluetooth printer, connect, select a demo file and let it print.
Continue reading ‘Windows Phone 8: print demo for bluetooth label/receipt printers’ »
As I needed a tool to test the maximum MTU size for a network, I needed a ping tool where I can define the packet size and the DF (Do Not Fragment-Flag). As I did not find such a tool, I wrote PingNG.
It is a simple tool but the code had to avoid some pitfalls.
Continue reading ‘Mobile Development: PingNG-the next generation ping’ »
An android label/receipt printing app for TCP/IP connected printers
This app is based on my btPrint4 app. In contrast to btPrint4 this time we print on TCP/IP connected printers to port 9100.
As with btPrint4 we have a main activity and one to list available printers and one to list available demo files.
The challenge with ipPrint4 was a replacement for the bluetooth device discovery. This time we have to scan TCP/IP address range for port 9100. This port is also called HP direct printing port and supported by many printers. It behaves similar to telnet and you can just send print commands to the interface.
The second main change to btPrint4 was the printing code. This time we do not have to use a bluetooth socket but a network TCP/IP socket.
A TCP/IP portscanner
If you scan a range of IP addresses in sequence and try to open a port with a timeout of, let’s say 200ms, the scan will take (200msx254, scan from 1 to 254) 50 seconds.
Port scan code Continue reading ‘android: ipPrint4 print label/receipts to ip printer’ »
today Plugins with compact framework
The following today or home screen plugins for Windows Mobile are based on a work of CrisText at codeplex.
The codeplex sources provide a framework to create home screen plugins very easily.
You just start a Form or UserControl and add the attribute “[TodayScreenItem("a unique name")]” before the class. Further on, the framework looks for such plugins dynamically and you can add or remove plugins by just adding or removing DLLs.
I did two plugins, one shows the Intermec device ID and the other enables you to have buttons on the home screen to directly launch applications.
Show some information
The first plugin is very simple. An user control that just shows some static text (see the lower info on the screen shot):
Continue reading ‘Mobile Development: writing today screen plugins the easy way’ »