Add PictureBox example

examples/picturebox/.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/picturebox/.vscode/launch.json

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

examples/picturebox/.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 picturebox_sample",
+			"detail": "dub build --compiler=dmd.EXE -a=x86_64 -b=debug -c=application"
+		}
+	]
+}

examples/picturebox/README.md

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

examples/picturebox/picturebox.code-workspace

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

examples/picturebox/source/picturebox_sample.d

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+import dfl;
+
+version(Have_dfl) // For DUB.
+{
+}
+else
+{
+	pragma(lib, "dfl.lib");
+}
+
+class MainForm : Form
+{
+	private PictureBox _pic1;
+	private PictureBox _pic2;
+	private PictureBox _pic3;
+	private PictureBox _pic4;
+	private PictureBox _pic5;
+
+	public this()
+	{
+		this.text = "PictureBox example";
+		this.size = Size(450, 450);
+
+		_pic1 = new PictureBox;
+		_pic2 = new PictureBox;
+		_pic3 = new PictureBox;
+		_pic4 = new PictureBox;
+		_pic5 = new PictureBox;
+
+		// Layout
+		// 1 2 3
+		// 4 5
+		_pic1.location = Point(0, 0);
+		_pic2.location = Point(110, 0);
+		_pic3.location = Point(220, 0);
+		_pic4.location = Point(0, 110);
+		_pic5.location = Point(110, 110);
+
+		_pic1.size = Size(100, 100);
+		_pic2.size = Size(100, 100);
+		_pic3.size = Size(200, 100); // wider than height
+		_pic4.size = Size(100, 100);
+		_pic5.size = Size(100, 100);
+
+		_pic1.parent = this;
+		_pic2.parent = this;
+		_pic3.parent = this;
+		_pic4.parent = this;
+		_pic5.parent = this;
+
+		_pic1.sizeMode = PictureBoxSizeMode.NORMAL;
+		_pic2.sizeMode = PictureBoxSizeMode.STRETCH_IMAGE;
+		_pic3.sizeMode = PictureBoxSizeMode.ZOOM;
+		_pic4.sizeMode = PictureBoxSizeMode.CENTER_IMAGE;
+		_pic5.sizeMode = PictureBoxSizeMode.AUTO_SIZE;
+
+		_pic1.borderStyle = BorderStyle.FIXED_SINGLE;
+		_pic2.borderStyle = BorderStyle.NONE;
+		_pic3.borderStyle = BorderStyle.FIXED_SINGLE;
+		_pic4.borderStyle = BorderStyle.FIXED_3D;
+		_pic5.borderStyle = BorderStyle.FIXED_3D;
+
+		// https://raw.githubusercontent.com/dlang/dlang.org/master/images/dman-error.jpg
+		Image image = new Bitmap(r".\image\dman-error.bmp");
+
+		_pic1.image = image;
+		_pic2.image = image;
+		_pic3.image = image;
+		_pic4.image = image;
+		_pic5.image = image;
+	}
+}
+
+static this()
+{
+	Application.enableVisualStyles();
+}
+
+void main()
+{
+	Application.run(new MainForm());
+}