PRISM 'VS100COMNTOOLS' not set Cannot set the build environment; Visual Studio Web Developer 2010 Express

This means that PRISM cannot find your Visual Studio installation folder. Add this line in RegisterPrismBinaries.bat:

SET VS100COMNTOOLS=c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\Tools\

(or whatever folder you have vsvars32.bat in).

The beginning of the file should look like this:

--------------------------------------------------------------

@ECHO OFF

SET ScriptsDir=%~dp0\Scripts
SET BinDir=.\Bin
SET Pause=true
SET Register=true
SET VS100COMNTOOLS=c:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\Tools\

IF "%1"=="/?" GOTO HELP

IF DEFINED DevEnvDir GOTO OPTIONS

IF NOT DEFINED VS100COMNTOOLS GOTO VSNOTFOUND
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After running RegisterPrismBinaries.bat you should see:

---------------------------------------------------------------

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Setting the build environment
------------------------------------------

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Registration initiated
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Microsoft (R) Build Engine Version 4.0.30319.1
[Microsoft .NET Framework, Version 4.0.30319.235]
Copyright (C) Microsoft Corporation 2007. All rights reserved.

Build started 2011-07-18 16:34:36.
Project "C:\PRISM4\Scripts\RegisterPrismLibrary.proj" on node 1 (default target
s).
RegisterLibrary:
  regedit.exe /s "C:\Users\kosiara\AppData\Local\Temp\tmp35B9.tmp"
  Deleting file "C:\Users\kosiara\AppData\Local\Temp\tmp35B9.tmp".
Done Building Project "C:\PRISM4\Scripts\RegisterPrismLibrary.proj" (default ta
rgets).

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:00.31

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Registration completed
------------------------------------------