WTL 自定义EDIT控件，如何屏蔽不想要的按键消息。

[forwtl]

class CMyEdit : public CWindowImpl<CMyEdit, CEdit>
{
public:
BEGIN_MSG_MAP(CMyEdit)
MESSAGE_HANDLER(WM_CONTEXTMENU, OnContextMenu)
MESSAGE_HANDLER(WM_KEYDOWN, OnKeyDown)
MESSAGE_HANDLER(WM_KEYUP, OnKeyUp)
MESSAGE_HANDLER(WM_SYSKEYDOWN, OnKeyDown)
MESSAGE_HANDLER(WM_SYSKEYUP, OnKeyUp)
END_MSG_MAP()

LRESULT OnKeyDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{

return 0;
}

LRESULT OnKeyUp(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
return 0;
}
}

我现在想屏蔽掉 backspace, delete 按键和所有的字符消息（就是只接收数字），
请问要如何做？

[珍惜生命远离CPP]

在WM_CHAR消息中处理

[forwtl]

如果是要屏蔽 ALT ，CTRL ??

[weiym]

class   CMyEdit :  public   CWindowImpl <CMyEdit, CEdit>
{
public:
    BEGIN_MSG_MAP(CMyEdit)
		MESSAGE_HANDLER(WM_CHAR, OnChar)
    END_MSG_MAP()
	LRESULT OnChar(UINT nMsgType, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
	{
		if(wParam > '9' || wParam < '0')
		{
			bHandled = TRUE;
		}
		else
		{
			bHandled = FALSE;
		}
		return S_OK;	
	}
} ;

[珍惜生命远离CPP]

屏蔽 ALT ，CTRL那就做键盘hook了
同进程连dll都不用.

[forwtl]

只有hook这一种办法吗？

[vcPlayer]

class   CMyEdit :  public   CWindowImpl <CMyEdit, CEdit>
{
public:
    BEGIN_MSG_MAP(CMyEdit)
        MESSAGE_HANDLER(WM_CHAR, OnChar)
    END_MSG_MAP()
    LRESULT OnChar(UINT nMsgType, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
    {
        // 这下面四个如果值小于0则表示按下:
 	short	nLeftShift = GetKeyState(VK_LSHIFT),
		nRightShift = GetKeyState(VK_RSHIFT),
		nLeftCtrl = GetKeyState(VK_LCONTROL),
		nRightCtrl = GetKeyState(VK_RCONTROL);

       if(wParam > '9' || wParam < '0')
        {
            bHandled = TRUE;
        }
        else
        {
            bHandled = FALSE;
        }
        return S_OK;    
    }
} ;