No native Japanese text in Windows Phone 7 … yet

The first preview version of the Windows Phone 7 SDK is out and it doesn’t support Japanese (or non-Latin) text in the English ROM. This is a huge disappointment.


One of the major advantages the iPhone has over almost every other smartphone platform (and the major reason I bought mine in the first place – I needed Japanese language support) is the built in support for non-Latin languages and their input methods. This allows Apple to provide one single worldwide firmware edition.

Previous versions of Windows Mobile have required users to hack in Japanese fonts using the registry and rely on some awful third party hacks to get Japanese IMEs working. I seriously hope that before WP7 is finished, Microsoft just install worldwide fonts and IMEs like they started to do with Vista. There is no excuse. We are unlikely to get low-level access to the registry this time around to hack the support in ourselves to non-Japanese ROMs.

One of their slides is supposed to imply that the Metro theme “Celebrates Typography”


— more like it totally ignores it. I suppose screens of square boxes fits the “Authentically Digital” principle.

Vista net problems? Disable auto-tuning

I have been having a problem where I would get “This page cannot be displayed” errors the first time I tried to access a website. The odd thing was that hitting Refresh would solve the problem and I would get through to the site immediately. At first, I thought it was a DNS problem due to the Internet Connection Sharing setup, but turns out it is Vista messing around with the net connection with a process called “Receive Window Auto-Tuning” (this alters the size of the packets on your network based on network conditions).

To turn this off, fire up an elevated command prompt window and type in “netsh interface tcp set global autotuninglevel=disabled” without the quotes. This solved all the problems I was having with my net connection in Vista SP1. Strange.


XNA2.0 Dependency checking

After a lot of trial and error using Process Monitor and Virtual PC, I have finally sussed out exactly what XNA2.0 games on Windows need to run. The requirements are slightly different to XNA 1 games.

Direct X runtimes

There are four files that need to be installed in the system32 folder for XNA to initialise properly. They are:

  • xinput1_3.dll
  • x3daudio1_3.dll
  • d3dx9_31.dll, and
  • xactengine2_9.dll

The first three can be placed alongside the application exe and then load fine, but xactengine2_9.dll does not load this way for some reason, and has to be present in the system directory. Distributing these files alongside the application breaks the DirectX EULA, so they have to be installed using dxsetup.exe.

To check the presence in your XNA game, just put this code in Program.cs before game.Run() is called:

bool HasAllPrereqs = true;
// check all the required files, if any missing, return false
if (!System.IO.File.Exists(System.Environment.SystemDirectory 
    + "\\xactengine2_9.dll")) HasAllPrereqs = false;
if (!System.IO.File.Exists(System.Environment.SystemDirectory 
    + "\\d3dx9_31.dll")) HasAllPrereqs = false;
if (!System.IO.File.Exists(System.Environment.SystemDirectory 
    + "\\x3daudio1_2.dll")) HasAllPrereqs = false;
if (!System.IO.File.Exists(System.Environment.SystemDirectory 
    + "\\xinput1_3.dll")) HasAllPrereqs = false;

If HasAllPrereqs is false after those lines, exit the application before it crashes horribly when XNA tries to initialise.

Visual C++ 2005 SP1 runtimes

Even a fresh Vista install doesn’t have these. They are provided when updating Visual Studio 2005 to SP1, or installing SP1 of the .Net Framework 2.0. However, Vista comes with SP0 of .Net 2.0, meaning 99% of machines you come across will be lacking what XNA 2.0 needs. There is a 2.5MB standalone installer on the MS download site here which installs what you need even on .Net 2.0 SP0 machines. .Net 3.5 installs Net 2.0 SP1.

So if any of the following are installed, we safely have the right Visual C++ 2005 runtimes:

  • .NET Framework 2.0 SP1
  • .NET Framework 3.5
  • Visual C++ 2005 SP1 Redistributable

By looking up the product codes in the registry, we can also check at runtime if we have the runtimes (again, before game.Run()):

public static extern Int32 MsiQueryProductState(string szProduct);

…goes before the main application entry point, and

bool vccOK = false;
// check for VC++ 2005 SP1 redist (very rare in the wild)
if (MsiQueryProductState(
"{7299052b-02a4-4627-81f2-1818da5d550d}") == 5) vccOK = true;
// check for .NET Framework 2.0 SP1
if (MsiQueryProductState(
"{2FC099BD-AC9B-33EB-809C-D332E1B27C40}") == 5) vccOK = true;
// check for .NET Framework 3.5 (includes 2.0 SP1)
if (MsiQueryProductState(
"{B508B3F1-A24A-32C0-B310-85786919EF28}") == 5) vccOK = true;

If vccOK is still false, exit the application before you call game.Run().