Updated Guide (markdown)

Guide.md

@@ -1 +1,92 @@
-### Coming soon™️
+## How to create a basic plugin
+
+1. Create a [.NET(Core) class library](https://docs.microsoft.com/en-us/dotnet/core/tutorials/library-with-visual-studio) project
+
+2. Add the [DesktopMagicPluginAPI](https://www.nuget.org/packages/DesktopMagicPluginAPI/) nuget package
+
+3. Create a class that inherits from `DesktopMagicPluginAPI.Plugin`
+
+4. Implement the reqired members from `DesktopMagicPluginAPI.Plugin`
+
+## Examples
+
+### Minimum example
+
+This is a very basic plugin that will display a constant string.
+
+```cs
+using DesktopMagicPluginAPI;
+using DesktopMagicPluginAPI.Drawing;
+using System.Diagnostics;
+using System.Drawing;
+
+namespace DesktopMagicPlugin
+{
+    public class MyFirstPlugin : Plugin
+    {
+        public override Bitmap Main()
+        {
+            Bitmap bmp = new Bitmap(1000, 1000);
+
+            using(Graphics g = Graphics.FromImage(bmp))
+            {
+                g.Clear(Application.Color); //Set the background color to the color specified in the Desktop Magic application.
+                
+                g.DrawStringFixedWidth("Hello", new Font(Application.Font, 100), Brushes.Black, new PointF(0, 0), 120); //Draw the "Hello" to the image.
+            }
+
+            return bmp; //Return the image.
+        }
+    }
+}
+```
+
+### Input example
+
+```cs
+using DesktopMagicPluginAPI;
+using DesktopMagicPluginAPI.Inputs;
+using DesktopMagicPluginAPI.Drawing;
+using System.Diagnostics;
+using System.Drawing;
+
+using DesktopMagicPluginAPI;
+using DesktopMagicPluginAPI.Inputs;
+using DesktopMagicPluginAPI.Drawing;
+using System.Drawing;
+
+namespace DesktopMagicPlugin
+{
+    public class InputExamplePlugin : Plugin
+    {
+        public override int UpdateInterval { get; set; } = 0;
+
+        [Element("Text:")] //Mark the property as element with the specified description
+        private TextBox textBox = new TextBox("abc"); //Create a text box with the specified default value.
+
+        public InputExamplePlugin()
+        {
+            textBox.OnValueChanged += TextBox_OnValueChanged; //Add an event handler to the "OnValueChanged" event.
+        }
+
+        private void TextBox_OnValueChanged()
+        {
+            Application.UpdateWindow(); //Update the pugin window. (Calls the "Main" method.)
+        }
+
+        public override Bitmap Main()
+        {
+            Bitmap bmp = new Bitmap(1000, 1000);
+
+            using (Graphics g = Graphics.FromImage(bmp))
+            {
+                g.Clear(Application.Color); //Set the background color to the color specified in the Desktop Magic application.
+
+                g.DrawStringFixedWidth(textBox.Value, new Font(Application.Font, 100), Brushes.Black, new PointF(0, 0), 120); //Draw the value of the text box to the image.
+            }
+
+            return bmp; //Return the image.
+        }
+    }
+}
+```