change runprebuild.bat to try to find msbuild of most recent visual studio instaled for compile.bat

runprebuild.bat

@@ -1,12 +1,26 @@
 @echo OFF
 
-bin\Prebuild.exe /target nant
 bin\Prebuild.exe /target vs2015
 
 setlocal ENABLEEXTENSIONS
-set KEY_NAME="HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions\4.0"
 set VALUE_NAME=MSBuildToolsPath
 
+
+rem try find vs2017
+if "%PROCESSOR_ARCHITECTURE%"=="x86" set PROGRAMS=%ProgramFiles%
+if defined ProgramFiles(x86) set PROGRAMS=%ProgramFiles(x86)%
+
+for %%e in (Enterprise Professional Community) do (
+
+    if exist "%PROGRAMS%\Microsoft Visual Studio\2017\%%e\MSBuild\15.0\Bin\MSBuild.exe" (
+
+        set ValueValue="%PROGRAMS%\Microsoft Visual Studio\2017\%%e\MSBuild\15.0\Bin\"
+		goto :found
+    )
+
+)
+
+
 rem We have to use grep or find to locate the correct line, because reg query spits
 rem out 4 lines before Windows 7 but 2 lines after Windows 7.
 rem We use grep if it's on the path; otherwise we use the built-in find command
@@ -19,20 +33,19 @@ if defined FOUNDGREP (
   set FINDCMD=find
 )
 
-FOR /F "usebackq tokens=1-3" %%A IN (`REG QUERY %KEY_NAME% /v %VALUE_NAME% 2^>nul ^| %FINDCMD% "%VALUE_NAME%"`) DO (
-    set ValueName=%%A
-    set ValueType=%%B
-    set ValueValue=%%C
+
+for %%v in (14.0, 12.0, 4.0) do (
+	FOR /F "usebackq tokens=1-3" %%A IN (`REG QUERY "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions\%%v" /v %VALUE_NAME% 2^>nul ^| %FINDCMD% "%VALUE_NAME%"`) DO (
+		set ValueValue=%%C
+		goto :found
+	)
 )
 
-if defined ValueName (
-    @echo Found msbuild path registry entry
-    @echo Value Name = %ValueName%
-    @echo Value Type = %ValueType%
-    @echo Value Value = %ValueValue%
+@echo %KEY_NAME%\%VALUE_NAME% not found.
+@echo Not creating compile.bat
+exit
+
+:found
+    @echo Found msbuild at %ValueValue%
     @echo Creating compile.bat
     @echo %ValueValue%\msbuild opensim.sln > compile.bat
-) else (
-    @echo %KEY_NAME%\%VALUE_NAME% not found.
-    @echo Not creating compile.bat
-)