void CBlogEdit::OnSetFocus(CWnd* pOldWnd)
{
    CEdit::OnSetFocus(pOldWnd);

    // 关闭输入法
    HIMC hIMC = ImmGetContext( this->GetSafeHwnd() );
    ImmSetOpenStatus ( hIMC, FALSE );
}

2. 映射 WM_CHAR 消息到 OnChar ()

void CBlogEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    // nChar 的值在不同手机上可能有所不同
    switch ( nChar )
    {
        // Up
        case 50:
        {
            this->LineScroll ( -1 );

            break;
        }

        // Down
        case 56:
        {
            this->LineScroll ( 1 );

            break;
        }

        // PageUp
        case 52:
        {
            this->LineScroll ( -11 );

            break;
        }

        // PageDown
        case 54:
        {
            this->LineScroll ( 11 );

            break;
        }
    }

    // CEdit::OnChar(nChar, nRepCnt, nFlags);
}