MSVC build batch files.

src/sexpots/build.bat

+@echo off
+setlocal
+rem *** Requires Microsoft Visual C++ 2019 ***
+call "%VS160COMNTOOLS%\VsMSBuildCmd.bat"
+msbuild sexpots.sln /p:Platform="Win32" %*
+if errorlevel 1 echo. & echo !ERROR(s) occurred & exit /b 1
\ No newline at end of file

src/sexpots/release.bat

+@echo off
+call build.bat "/p:Configuration=Release" %*
\ No newline at end of file