add --arch, --compiler and --build_only cmdline args
diff --git a/vsprojects/build_vs2015.bat b/vsprojects/build_vs2015.bat
new file mode 100644
index 0000000..50485a3
--- /dev/null
+++ b/vsprojects/build_vs2015.bat
@@ -0,0 +1,10 @@
+@rem Convenience wrapper that runs specified gRPC target using msbuild
+@rem Usage: build.bat TARGET_NAME
+
+setlocal
+@rem Set VS variables (uses Visual Studio 2015)
+@call "%VS140COMNTOOLS%\..\..\vc\vcvarsall.bat" x86
+
+msbuild %*
+exit /b %ERRORLEVEL%
+endlocal