CEditView/CEdit 中Ctrl + A 全选功能的实现

以类class CDummyEdit : public CEditView为例：

1） 在.h中添加：

// Generated message map functions

protected:

//{{AFX_MSG(CDummyEdit)

// NOTE - the ClassWizard will add and remove member functions here.

afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);

//}}AFX_MSG

DECLARE_MESSAGE_MAP()

2）.Cpp中添加:

BEGIN_MESSAGE_MAP(CDummyEdit, CEditView)

//{{AFX_MSG_MAP(CDummyEdit)

// NOTE - the ClassWizard will add and remove mapping macros here.

ON_WM_KEYDOWN()

//}}AFX_MSG_MAP

END_MESSAGE_MAP()

void CDummyEdit::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 

{

// TODO: Add your message handler code here and/or call default

if( (nChar == 'a') || ( nChar == 'A') )

{

short nKeyState = GetKeyState(VK_CONTROL);

BOOL bCtrlCKeyDown = nKeyState & 0x80;

if(bCtrlCKeyDown)//   Key   is   down   

{

GetEditCtrl().SetSel( 0, -1); 

}

}   

CEditView::OnKeyDown(nChar, nRepCnt, nFlags);

}