tryButton.cs

#pragma warning disable 109, 114, 219, 429, 168, 162
public class EntryPoint__Main {
	public static void Main() {
		global::cs.Boot.init();
		global::Main.main();
	}
}

public class Main {
	
	public Main() {
	}
	
	
	public static void main() {
		global::System.Windows.Forms.Application.EnableVisualStyles();
		global::System.Windows.Forms.Application.Run(((global::System.Windows.Forms.Form) (new global::AppForm()) ));
	}
	
	
}



#pragma warning disable 109, 114, 219, 429, 168, 162
public class AppForm : global::System.Windows.Forms.Form {
	
	public AppForm() : base() {
		global::System.Windows.Forms.Button btn = new global::System.Windows.Forms.Button();
		( this as global::System.Windows.Forms.Control ).Controls.Add(((global::System.Windows.Forms.Control) (btn) ));
		( btn as global::System.Windows.Forms.Control ).Text = ((string) ("Press me!") );
		{
			global::System.EventHandler arg2 = null;
			{
				global::System.EventHandler this1 = null;
				this1 = ((global::System.EventHandler) (this.clickHandler) );
				arg2 = ((global::System.EventHandler) (this1) );
			}
			
			btn.Click = ( btn.Click + arg2 );
		}
		
	}
	
	
	public virtual void clickHandler(object sender, global::System.EventArgs e) {
		unchecked {
			global::haxe.Log.trace.__hx_invoke2_o(default(double), "Thank you!", default(double), new global::haxe.lang.DynamicObject(new int[]{302979532, 1547539107, 1648581351}, new object[]{"clickHandler", "AppForm", "Main.hx"}, new int[]{1981972957}, new double[]{((double) (34) )}));
		}
	}
	
	
}

tryButtonHx.hx

package;

import cs.system.windows.forms.Application;
import cs.system.windows.forms.Form;
import cs.system.EventHandler;

/**
 * ...
 * @author Michael
 */

@:nativeGen class Main
{
    static function main()
    {
        Application.EnableVisualStyles();
        Application.Run(new AppForm());
    }
}

@:nativeGen class AppForm extends Form {
    public function new() {
        super();
       
        var btn = new cs.system.windows.forms.Button();
        this.Controls.Add(btn);
        btn.Text = 'Press me!';

        btn.Click += new EventHandler(clickHandler);
           
    }
   
    function clickHandler(sender:Dynamic, e:cs.system.EventArgs):Void {
        trace('Thank you!');
    }
}