protected override void OnHandleCreated(EventArgs args)
{
base.OnHandleCreated(args);
string itemText = "Natural Size";
IntPtr sysMenuHandle = UnsafeNativeMethods.GetSystemMenu(Handle, false);
NativeMethods.MenuItemInfo info = new NativeMethods.MenuItemInfo();
info.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(typeof(NativeMethods.MenuItemInfo));
info.fMask = NativeMethods.MIIM_STRING | NativeMethods.MIIM_STATE | NativeMethods.MIIM_ID | NativeMethods.MIIM_DATA;
info.fType = NativeMethods.MFT_STRING;
info.fState = NativeMethods.MFS_DEFAULT;
info.dwItemData = NativeMethods.SC_NATURALSIZE;
info.wID = NativeMethods.SC_NATURALSIZE;
info.dwTypeData = itemText;
info.cch = itemText.Length;
info.hSubMenu = IntPtr.Zero;
info.hbmpChecked = IntPtr.Zero;
info.hbmpUnchecked = IntPtr.Zero;
UnsafeNativeMethods.InsertMenuItem(sysMenuHandle, 5, true, ref info);
UnsafeNativeMethods.DrawMenuBar(Handle);
UpdateNaturalSizeMenuItem();
}
public static extern bool InsertMenuItem(IntPtr hMenu, int uItem, bool fByPosition, ref NativeMethods.MenuItemInfo lpmii);
