爲什麼不工作KeyDown CTRL + KEY？

Question

在下面的代碼中，兩次調用Zoom(0.1f);和Zoom(-0.1f);工作，但我不能觸發兩個UndoRedoManager.Undo();和UndoRedoManager.Redo();呼籲CTRL +ž和 CTRL +ÿ。我究竟做錯了什麼？

public void WorkspaceKeyDown(KeyEventArgs e) 
{ 
    if (e.Control == true) 
     isCtrlPres = true; 
    if (e.Shift == true) 
     isShiftPres = true; 
    if (e.Control == true && e.KeyCode == Keys.Z) 
    { 
     UndoRedoManager.Undo(); 
    } 
    else if (e.Control == true && e.KeyCode == Keys.Y) 
    { 
     UndoRedoManager.Redo(); 
    } 
    else if (e.Control == true && e.KeyCode == Keys.Oemplus) 
    { 
     Zoom(0.1f); 
    } 
    else if (e.Control == true && e.KeyCode == Keys.OemMinus) 
    { 
     Zoom(-0.1f); 
    } 

Answer 1

.ShortcutKeys = ((System.Windows.Forms.Keys)((System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.Z)));