private int CountUndos(Interop.IEnumOleUndoUnits enumerator)
{
int num2 = 0;
IntPtr zero = IntPtr.Zero;
enumerator.Reset();
try
{
int num;
while (enumerator.Next(1, out zero, out num) == 0)
{
Interop.IOleUndoUnit objectForIUnknown = (Interop.IOleUndoUnit) Marshal.GetObjectForIUnknown(zero);
Marshal.Release(zero);
if ((enumerator == null) || (num == 0))
{
return num2;
}
num2++;
}
}
catch (Exception exception)
{
MessageBox.Show(exception.ToString(), "Exception in CountUndos");
}
return num2;
}
private void Pack(Interop.IEnumOleUndoUnits enumerator)
{
int num;
enumerator.Reset();
Interop.IOleUndoUnit[] unitArray = new Interop.IOleUndoUnit[this._startIndex];
this._undoUnits = new Interop.IOleUndoUnit[this._numUndos];
IntPtr zero = IntPtr.Zero;
for (int i = 0; i < this._startIndex; i++)
{
enumerator.Next(1, out zero, out num);
unitArray[i] = (Interop.IOleUndoUnit) Marshal.GetObjectForIUnknown(zero);
Marshal.Release(zero);
}
for (int j = 0; j < this._numUndos; j++)
{
enumerator.Next(1, out zero, out num);
this._undoUnits[j] = (Interop.IOleUndoUnit) Marshal.GetObjectForIUnknown(zero);
Marshal.Release(zero);
}
this._undoManager.DiscardFrom(null);
for (int k = 0; k < this._startIndex; k++)
{
this._undoManager.Add(unitArray[k]);
}
this._undoManager.Add(this);
}
