How to change the navigation button size in WinForms TabControlAdv?

//Add reflection namespace
using System.Reflection;
 
//TabControlAdv Item size
this.tabControlAdv1.ItemSize = new Size(this.tabControlAdv1.ItemSize.Width, 50);
//Set the TabPrimitive size
foreach (TabPrimitive item in this.tabControlAdv1.TabPrimitivesHost.TabPrimitives)
{
  var obj = item;
  FieldInfo fi = obj.GetType().GetField("m_szSize", BindingFlags.NonPublic | BindingFlags.Instance);
  //Set the size
  fi.SetValue(obj, new Size(50, 50));
}
 
//Custom Button Image
this.tabControlAdv1.TabPrimitivesHost.TabPrimitives.Add(new TabPrimitive(TabPrimitiveType.NextPage, Properties.Resources.loadscreen, Color.FromArgb(64,64,64), true, 1, "TabPrimitive0", ""));
this.tabControlAdv1.TabPrimitivesHost.TabPrimitives.Add(new TabPrimitive(TabPrimitiveType.PreviousTab, Properties.Resources.dp4, Color.FromArgb(64, 64, 64), true, 1, "TabPrimitive1", ""));
this.tabControlAdv1.TabPrimitivesHost.TabPrimitives.Add(new TabPrimitive(TabPrimitiveType.DropDown, Properties.Resources.dp2, Color.FromArgb(64, 64, 64), true, 1, "TabPrimitive2", ""));
this.tabControlAdv1.TabPrimitivesHost.TabPrimitives.Add(new TabPrimitive(TabPrimitiveType.FirstTab, Properties.Resources.dp3, Color.FromArgb(64, 64, 64), true, 1, "TabPrimitive3", ""));
 

‘Add reflection namespace
Imports System.Reflection
 
'TabControlAdv Item size
Me.tabControlAdv1.ItemSize = New Size(Me.tabControlAdv1.ItemSize.Width, 50)
'Set the TabPrimitive Buttons size
For Each item As TabPrimitive In Me.tabControlAdv1.TabPrimitivesHost.TabPrimitives
  Dim obj = item
  Dim fi As FieldInfo = obj.GetType().GetField("m_szSize", BindingFlags.NonPublic Or BindingFlags.Instance)
  fi.SetValue(obj, New Size(50, 50))
Next item
 
'Custom Button Image
Me.tabControlAdv1.TabPrimitivesHost.TabPrimitives.Add(New TabPrimitive (TabPrimitiveType.NextPage, My. Resources.loadscreen, Color.FromArgb(64,64,64), True, 1, "TabPrimitive0", ""))
Me.tabControlAdv1.TabPrimitivesHost.TabPrimitives.Add(New TabPrimitive (TabPrimitiveType.PreviousTab, My. Resources.dp4, Color.FromArgb(64, 64, 64), True, 1, "TabPrimitive1", ""))
Me.tabControlAdv1.TabPrimitivesHost.TabPrimitives.Add(New TabPrimitive (TabPrimitiveType.DropDown, My. Resources.dp2, Color.FromArgb(64, 64, 64), True, 1, "TabPrimitive2", ""))
Me.tabControlAdv1.TabPrimitivesHost.TabPrimitives.Add(New TabPrimitive (TabPrimitiveType.FirstTab, My. Resources.dp3, Color.FromArgb(64, 64, 64), True, 1, "TabPrimitive3", ""))