Add build tasks to the Visual Studio Code workspace file to enable building with MSBuild in VSCode.

proj/vscode/.gitignore

@@ -1,3 +1,5 @@
 # Folder local settings are ignored.
 # Settings that should be checked in should go in the workspace file.
 .vscode/settings.json
+# This is needed to make the build system machine-independent.
+vswhere.exe

proj/vscode/Invoke-CmdScript.ps1

@@ -0,0 +1,62 @@
+##############################################################################
+##
+## Invoke-CmdScript
+##
+## From PowerShell Cookbook (O'Reilly)
+## by Lee Holmes (http://www.leeholmes.com/guide)
+## <https://powershellcookbook.com/recipe/WqHr/program-retain-changes-to-environment-variables-set-by-a-batch-file>
+##
+##############################################################################
+
+<#
+
+.SYNOPSIS
+
+Invoke the specified batch file (and parameters), but also propagate any
+environment variable changes back to the PowerShell environment that
+called it.
+
+.EXAMPLE
+
+PS > type foo-that-sets-the-FOO-env-variable.cmd
+@set FOO=%*
+echo FOO set to %FOO%.
+
+PS > $env:FOO
+PS > Invoke-CmdScript "foo-that-sets-the-FOO-env-variable.cmd" Test
+
+C:\Temp>echo FOO set to Test.
+FOO set to Test.
+
+PS > $env:FOO
+Test
+
+#>
+
+param(
+    ## The path to the script to run
+    [Parameter(Mandatory = $true)]
+    [string] $Path,
+
+    ## The arguments to the script
+    [string] $ArgumentList
+)
+
+Set-StrictMode -Version 3
+
+$tempFile = [IO.Path]::GetTempFileName()
+
+## Store the output of cmd.exe.  We also ask cmd.exe to output
+## the environment table after the batch file completes
+cmd /c " `"$Path`" $argumentList && set > `"$tempFile`" "
+
+## Go through the environment variables in the temp file.
+## For each of them, set the variable in our local environment.
+Get-Content $tempFile | Foreach-Object {
+    if($_ -match "^(.*?)=(.*)$")
+    {
+        Set-Content "env:\$($matches[1])" $matches[2]
+    }
+}
+
+Remove-Item $tempFile

proj/vscode/build.ps1

@@ -0,0 +1,25 @@
+
+Set-Location proj\vscode
+
+$vswhere_path = "vswhere.exe"
+
+if(-not(Test-Path -path $vswhere_path)) {
+	(New-Object Net.WebClient).DownloadFile('https://github.com/microsoft/vswhere/releases/latest/download/vswhere.exe', $vswhere_path)
+	if(-not(Test-Path -path $vswhere_path)) {
+		Write-Output 'Failed to download vswhere.exe'
+		exit 1
+	}
+}
+
+# $msbuild_path = .\proj\vscode\vswhere -latest -products * -requires Microsoft.Component.MSBuild -find MSBuild\**\Bin\MSBuild.exe | select-object -first 1
+$vars_path = .\vswhere -latest -products * -requires Microsoft.Component.MSBuild -find **\VC\Auxiliary\Build\vcvars64.bat
+if($vars_path) {
+	.\Invoke-CmdScript $vars_path
+	# Write-Output $msbuild_path @args
+	# & "$msbuild_path\..\..\..\..\VC\Auxiliary\Build\vcvars64.bat"
+	# Write-Output $env:PATH
+	MSBuild @args
+} else {
+	Write-Output 'Could not find MSBuild.exe'
+	exit 1
+}

proj/vscode/oboe.code-workspace

@@ -10,6 +10,62 @@
 			"ms-vscode.cpptools",
 		]
 	},
+	"tasks": {
+		"version": "2.0.0",
+		"tasks": [
+			{
+				"label": "Build (Debug)",
+				"windows": {
+					"type": "process",
+					"command": "powershell",
+					"args": [
+						"${workspaceFolder}/proj/vscode/build.ps1",
+						"/property:GenerateFullPaths=true",
+						"/property:VcpkgConfiguration=Debug",
+						"/t:build",
+						"\"${workspaceRoot}\\proj\\vs2017\\Blades of Exile.sln\""
+					],
+					"problemMatcher": "$msCompile",
+				},
+				"group": "build"
+			},
+			{
+				"label": "Build (Release)",
+				"windows": {
+					"type": "process",
+					"command": "powershell",
+					"args": [
+						"${workspaceFolder}/proj/vscode/build.ps1",
+						"/property:GenerateFullPaths=true",
+						"/property:VcpkgConfiguration=Release",
+						"/t:build",
+						"${workspaceRoot}\\proj\\vs2013\\Blades of Exile.sln"
+					],
+					"problemMatcher": "$msCompile",
+				},
+				"group": "build"
+			},
+			{
+				"label": "Run tests",
+				"windows": {
+					"type": "process",
+					"command": "${workspaceRoot}\\proj\\vs2013\\Release\\OBoE Tests.exe",
+					"problemMatcher": {
+						"fileLocation": ["relative", "${workspaceRoot}"],
+						"pattern": {
+							"regexp": "^\\.(.*)\\((\\d+)\\): FAILED$",
+							"file": 1,
+							"line": 2
+						}
+					},
+				},
+				"options": {
+					"cwd": "${workspaceRoot}/test"
+				},
+				"group": "test"
+			}
+		]
+	},
 	"settings": {
 		"xml.fileAssociations": [
 			{