Are you having problems running DCOM on CE 5.0?

It turns out there was a bug in the way that the CE 5.0 registry was initialized for hive based registries.  This was manifesting itself in DCOM related registry keys, causing them to be garbled and making DCOM not function. We’ve fixed the problem in a QFE — http://support.microsoft.com/kb/904254.  If you use DCOM on WinCE…

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More on Extending the Windows CE Bluetooth Hands Free Profile

In a previous blog article I discussed the basics of extending the Windows CE Bluetooth Hands Free Profile.  This included how to plug into the Audio Gateway (AG) in order to send and receive AT commands from a Hands Free (HF) device.  In this article I will discuss exactly what commands you might want to…

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Default LSPs in WM 5.0 [autobind_lsp].

The following description of the autobind_lsp is copied  fromhttp://www.intrinsyc.com/whitepapers/RIL_whitepaper_MS_Intrinsyc_June2004.pdf”When an application makes a Connection Manager connection request, Connection Manager determines which IP interface the application should use to reach the destination network requested.  Connection manager passes this information to the AutoBind LSP.  If the application does not explicitly bind its sockets to an interface, then…

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Writing a network audio driver in Windows CE – Part 3 – Bandwidth

            This blog will discuss bandwidth, the second bullet point in my first blog about networked audio drivers.             In an audio driver that plays directly to local hardware (local audio driver or LAD), bandwidth is usually not a concern since it is only dependent on internal components (disk bandwidth, bus speed, processor speed, DMAs, etc) which…

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When should I write to device.exe instead of services.exe?

By default, if you have some long running system service, you should target it to run in services.exe.  To quote the services.exe white paper  when it described why putting say a web server in device.exe was a bad idea: However, using device.exe also posed some problems. A lot of other components run in device.exe, including…

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Default LSPs in WM 5.0

In WM 5.0 2 new LSPs are present by default, the dtpt_lsp and the autobind_lsp. This article will discuss the dtpt_lsp and the next article will talk about the autobind_lsp. Desktop Passthrough (DTPT)  is the  technology that allows the CE device to talk on the desktop network while Active Sync is running. DTPT is implemented using a…

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Writing a network audio driver in Windows CE – Part 2 – Timing

[Revision 10/20/05 – minor changes to make content clearer]   This blog will discuss timing, the first bullet point in my first blog about networked audio drivers. In an audio driver that plays directly to local hardware (LAD), the mechanism for timing is usually relatively simple. The driver writes to hardware buffers, stops writing when…

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Why aren’t my virtual roots showing up in the CE Web Server?

When configuring the CE Web Server’s virtual root settings in the registry, there are a number of mistakes people make that cause their VRoot to not show up the way they expect.  I’m targeting this both at OEMs who will typically put these registry settings into project.reg, and PPC/SP ISVs who will be putting the…

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How do clients know a service is ready?

Often clients start before servers, and need to be signaled when the service is ready. In this post we’ll  find a good solution to this problem. Approach #1: Server signals a named event, clients waits for the event.     Server:         //Create manual reset event for service started         hEvent = CreateEvent(NULL,TRUE,FALSE, SRV_STARTED_EVENT);         SetEvent(hEvent)…

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Writing a network audio driver in Windows CE – Part 1

[Updated to reflect status of other parts of this blog]           In this series of blogs I will discuss the implementation of an audio driver that starts from the wavdev sample and streams audio over a network in real time. In part 1 I will list the main things that one has to worry…

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