void RemoveShellMenuItems(Menu menu)
{
const int tag = 0xAB;
List <int> remove = new List <int>();
int count = ShellNativeMethods.GetMenuItemCount(menu.Handle);
MENUINFO menuInfo = new MENUINFO();
MENUITEMINFO itemInfo = new MENUITEMINFO();
menuInfo.cbSize = Marshal.SizeOf(menuInfo);
menuInfo.fMask = MIM.MIM_MENUDATA;
itemInfo.cbSize = (uint)Marshal.SizeOf(itemInfo);
itemInfo.fMask = (uint)MIIM.MIIM_ID | (uint)MIIM.MIIM_SUBMENU;
// First, tag the managed menu items with an arbitary
// value (0xAB).
TagManagedMenuItems(menu, tag);
for (int n = 0; n < count; ++n)
{
ShellNativeMethods.GetMenuItemInfo(menu.Handle, n, true, ref itemInfo);
if (itemInfo.hSubMenu == IntPtr.Zero)
{
// If the item has no submenu we can't get the tag, so
// check its ID to determine if it was added by the shell.
if (itemInfo.wID >= m_CmdFirst)
{
remove.Add(n);
}
}
else
{
ShellNativeMethods.GetMenuInfo(itemInfo.hSubMenu, ref menuInfo);
if (menuInfo.dwMenuData != tag)
{
remove.Add(n);
}
}
}
// Remove the unmanaged menu items.
remove.Reverse();
foreach (int position in remove)
{
ShellNativeMethods.DeleteMenu(menu.Handle, position, MF.MF_BYPOSITION);
}
}
/// <summary>
/// Shows a context menu for a shell item.
/// </summary>
///
/// <param name="control">
/// The parent control.
/// </param>
///
/// <param name="pos">
/// The position on <paramref name="control"/> that the menu
/// should be displayed at.
/// </param>
public void ShowContextMenu(Point pos, Boolean isNew = false)
{
using (ContextMenu menu = new ContextMenu())
{
Populate(menu);
int count = ShellNativeMethods.GetMenuItemCount(menu.Handle);
MENUITEMINFO itemInfo = new MENUITEMINFO();
itemInfo.cbSize = (uint)Marshal.SizeOf(itemInfo);
itemInfo.fMask = (uint)MIIM.MIIM_FTYPE;
for (int i = 0; i < count; i++)
{
if (ShellNativeMethods.GetMenuItemInfo(menu.Handle, i, true, ref itemInfo))
{
var isSep = (itemInfo.fType & 2048) != 0;
if (i == count - 1)
{
ShellNativeMethods.GetMenuItemInfo(menu.Handle, i, true, ref itemInfo);
if ((itemInfo.fType & 2048) != 0)
{
ShellNativeMethods.DeleteMenu(menu.Handle, i, MF.MF_BYPOSITION);
}
}
else if (i < count - 1)
{
ShellNativeMethods.GetMenuItemInfo(menu.Handle, i + 1, true, ref itemInfo);
}
if (isSep && (itemInfo.fType & 2048) != 0)
{
ShellNativeMethods.DeleteMenu(menu.Handle, i, MF.MF_BYPOSITION);
}
}
}
int command = ShellNativeMethods.TrackPopupMenuEx(menu.Handle,
TPM.TPM_RETURNCMD, pos.X, pos.Y, m_MessageWindow.Handle,
IntPtr.Zero);
if (command > 0)
{
string info = string.Empty;
byte[] bytes = new byte[256];
int index;
m_ComInterface.GetCommandString(command - m_CmdFirst, 4, 0, bytes, 260);
index = 0;
while (index < bytes.Length - 1 && (bytes[index] != 0 || bytes[index + 1] != 0))
{
index += 2;
}
if (index < bytes.Length - 1)
{
info = Encoding.Unicode.GetString(bytes, 0, index); //+ 1);
}
if (!isNew)
{
if (info == "rename")
{
Explorer.DoRename();
}
else if (info == "cut")
{
Explorer.DoCut();
}
else
{
InvokeCommand(command - m_CmdFirst);
}
}
else
{
if (String.IsNullOrEmpty(info))
{
var newItems = GetNewContextMenuItems();
InvokeCommand(m_ComInterface3, newItems[command - m_CmdFirst - 3], this.Explorer.NavigationLog.CurrentLocation.ParsingName, pos);
}
else
{
InvokeCommand(m_ComInterface3, info, this.Explorer.NavigationLog.CurrentLocation.ParsingName, pos);
}
}
}
}
}