Add Timer example

examples/timer/.gitignore

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+.dub
+docs.json
+__dummy.html
+docs/
+/hello_dfl
+hello_dfl.so
+hello_dfl.dylib
+hello_dfl.dll
+hello_dfl.a
+hello_dfl.lib
+hello_dfl-test-*
+*.exe
+*.pdb
+*.o
+*.obj
+*.lst

examples/timer/.vscode/launch.json

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+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "C++ Launch (Windows) timer",
+            "type": "cppvsdbg",
+            "request": "launch",
+            "cwd": "${workspaceRoot}",
+            "program": "./bin/timer_sample.exe",
+            "console": "internalConsole"
+        }
+    ]
+}

examples/timer/.vscode/tasks.json

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+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "dub",
+			"run": false,
+			"cwd": ".",
+			"compiler": "$current",
+			"archType": "$current",
+			"buildType": "$current",
+			"configuration": "$current",
+			"problemMatcher": [
+				"$dmd"
+			],
+			"group": "build",
+			"label": "dub: Build timer_sample",
+			"detail": "dub build --compiler=dmd.EXE -a=x86_64 -b=debug -c=application"
+		}
+	]
+}

examples/timer/README.md

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+# Screen Shot
+![screen shot](./image/screenshot.png "screen shot")

examples/timer/dub.json

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+{
+	"authors": ["haru-s"],
+	"copyright": "Copyright (C) 2023 haru-s",
+	"description": "DFL sample code.",
+	"name": "timer_sample",
+	"targetType": "executable",
+	"targetPath": "bin",
+	"dependencies": {
+		"dfl": {
+			"path": "../../../dfl"
+		}
+	},
+	"lflags-windows-x86_omf-dmd":    ["/exet:nt/su:windows:6.0"],
+	"lflags-windows-x86_mscoff-dmd": ["/SUBSYSTEM:WINDOWS", "/ENTRY:mainCRTStartup"],
+	"lflags-windows-x86_64-dmd":     ["/SUBSYSTEM:WINDOWS", "/ENTRY:mainCRTStartup"]
+}

examples/timer/shell.bat

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+set dmd_path=c:\d\dmd2\windows
+set dmc_path=c:\dmc\dm
+cmd

examples/timer/source/timer_sample.d

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+import dfl;
+import std.conv;
+
+version(Have_dfl) // For DUB.
+{
+}
+else
+{
+	pragma(lib, "dfl.lib");
+}
+
+class MainForm : Form
+{
+	private Label _label;
+	private Timer _timer;
+	private Button _start;
+	private Button _stop;
+	private uint _count;
+
+	public this()
+	{
+		this.text = "Timer example";
+		this.size = Size(300, 200);
+
+		_label = new Label;
+		_label.location = Point(100, 0);
+		_label.font = new Font("Verdana", 50f);
+		_label.autoSize = true;
+		_label.text = to!string(_count);
+		_label.parent = this;
+
+		_timer = new Timer;
+		_timer.interval = 1000;
+		_timer.tick ~= (Timer t, EventArgs e) {
+			_label.text = to!string(_count);
+			_count++;
+		};
+
+		_start = new Button;
+		_start.text = "Start";
+		_start.location = Point(10, 10);
+		_start.click ~= (Control c, EventArgs e) {
+			_timer.start();
+		};
+		_start.parent = this;
+
+		_stop = new Button;
+		_stop.text = "Stop";
+		_stop.location = Point(10, 50);
+		_stop.click ~= (Control c, EventArgs e) {
+			_timer.stop();
+		};
+		_stop.parent = this;
+	}
+}
+
+static this()
+{
+	Application.enableVisualStyles();
+}
+
+void main()
+{
+	Application.run(new MainForm());
+}

examples/timer/timer.code-workspace

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+{
+	"folders": [
+		{
+			"path": "."
+		}
+	],
+	"settings": {
+		"d.projectImportPaths": [
+			"..\\..\\..\\dfl\\source"
+		]
+	}
+}