View difference between Paste ID: CycVmSjK and stNhA1wE

 using System;
 using System.ComponentModel;
 using System.Drawing;
 using System.Windows.Forms;
-using NativeMethods;
+
 //Modify the Namespace as required
 namespace [ADD A NAMESPACE]
 {
     public class ComboCustomBorder : ComboBox
     {
         private const int WM_PAINT = 0xF;
         private const int WM_NCPAINT = 0x0085;
         private const int WM_SYNCPAINT = 0x0088;
         private int m_buttonWidth = SystemInformation.HorizontalScrollBarArrowWidth;
         private Color m_BorderColor = Color.Red;
         private Color m_FadedBorderColor = Color.Red;
         private ControlBorderDrawMode m_BorderDrawMode = ControlBorderDrawMode.Full;
         private Rectangle m_BorderDrawArea = Rectangle.Empty;
 
         public enum ControlBorderDrawMode : int
         {
             Full = 0,
             Internal,
             InternalFaded
         }
 
         public ComboCustomBorder() => InitializeComponent();
 
         private void InitializeComponent()
         {
             SetStyle(ControlStyles.ResizeRedraw |
                      ControlStyles.SupportsTransparentBackColor, true);
             this.DrawMode = DrawMode.Normal;
             this.BorderColor = Color.SteelBlue;
         }
 
         protected override void OnHandleCreated(EventArgs e)
         {
             this.SetBorderArea();
             base.OnHandleCreated(e);
         }
 
         protected override void WndProc(ref Message m)
         {
-            if (m.Msg == WM_PAINT | m.Msg == (int)WinApi.WinMessage.WM_SYNCPAINT | m.Msg == (int)WinApi.WinMessage.WM_NCPAINT)
+
             if (m.Msg == WM_PAINT | m.Msg == WM_SYNCPAINT | m.Msg == WM_NCPAINT)
             {
                 using (Graphics g = Graphics.FromHwnd(this.Handle))
                 {
                     this.SetBorderArea();
                     using (Pen pen = new Pen((this.m_BorderDrawMode == ControlBorderDrawMode.InternalFaded)
                                    ? this.m_FadedBorderColor
                                    : this.m_BorderColor, 1))
                     {
                         if (this.BorderDrawMode == ControlBorderDrawMode.Full)
                             g.DrawLine(pen, this.ClientRectangle.Width - m_buttonWidth, 0,
                                             this.ClientRectangle.Width - m_buttonWidth, this.ClientRectangle.Height - 1);
                         g.DrawRectangle(pen, m_BorderDrawArea);
                     }
                 }
                 m.Result = IntPtr.Zero;
             }
         }
 
         private void SetBorderArea()
         {
             switch (this.m_BorderDrawMode)
             {
                 case ControlBorderDrawMode.Full:
                     this.m_BorderDrawArea =
                         new Rectangle(
                             Point.Empty,
                             new Size(this.ClientRectangle.Width - 1, this.ClientRectangle.Height - 1));
                     break;
                 case ControlBorderDrawMode.Internal:
                     this.m_BorderDrawArea =
                         new Rectangle(
                             Point.Empty,
                             new Size(this.ClientRectangle.Width - m_buttonWidth, this.ClientRectangle.Height - 1));
                     break;
                 case ControlBorderDrawMode.InternalFaded:
                     this.m_FadedBorderColor = Color.FromArgb(96, this.m_BorderColor);
                     this.m_BorderDrawArea =
                         new Rectangle(
                             new Point(0, 0),
                             new Size(this.ClientRectangle.Width - m_buttonWidth - 2, this.ClientRectangle.Height - 2));
                     break;
             }
         }
 
         [Browsable(true), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
         [EditorBrowsable(EditorBrowsableState.Always), Category("Appearance")]
         [Description("Determines how the colored border is drawn. " +
                      "Full: specifies the control's client area and the DropDown Button" +
                      "Internal: the intenal section of the control, excluding the DropDown Button.")]
         public ControlBorderDrawMode BorderDrawMode
         {
             get => this.m_BorderDrawMode;
             set { this.m_BorderDrawMode = value; Invalidate(); }
         }
 
         [Browsable(true), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
         [EditorBrowsable(EditorBrowsableState.Always), Category("Appearance")]
         [Description("Get or Set the Color of the Control's border")]
         public Color BorderColor {
             get => this.m_BorderColor;
             set { this.m_BorderColor = value; Invalidate(); }
         }
     }
 }