Step 1

Add OnKeyDown method declaration in .h file of subclass of CView like as:
  1. afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
nChar

Virtual key code of the given key. see Winuser.h

nRepCnt

Repeat count.

nFlags

 Specifies the scan code, key-transition code, previous key state, and context code.

Step 2

Add ON_WM_KEYDOWN() in BEGIN_MESSAGE_MAP and END_MESSAGE_MAP in .m file of subclass of CView like as:
  1. BEGIN_MESSAGE_MAP(CDrawViewView, CView)
  2. ON_WM_KEYDOWN()
  3. END_MESSAGE_MAP()
Here , CDrawViewView is a subclass of CView.
Step 3

Add OnKeyDown event definition in .m file like as:
  1. /* Key Down Events */
  2. void CDrawViewView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
  3. {
  4. switch (nChar)
  5. {
  6. case VK_DELETE:
  7. AfxMessageBox(L"Delete Key Pressed");
  8. break;
  9. default:
  10. CView::OnKeyDown(nChar, nRepCnt, nFlags);
  11. }
  12. }
In above method , get delete key event and showing message box with text "Delete Key Pressed". And VK_DELETE define in winuser.h.