first commit

Classes/TextBoxConPaste.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace EFCDesk.Classes
+{
+    public class TextBoxConPaste : TextBox
+    {
+        private const int WM_PASTE = 0x0302;
+
+        protected override void WndProc(ref Message m)
+        {
+            base.WndProc(ref m);
+
+            if (m.Msg == WM_PASTE)
+            {
+                // Después de pegar, limpiar portapapeles
+                Clipboard.Clear();
+            }
+        }
+    }
+}