CRichEdit control Scrollbar issue in MFC Application

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C++

In my MFC application i am using CRichEdit control for multiline text.
I have set the below properties for the rich edit control.

ES_MULTILINE | ES_NOHIDESEL | ES_READONLY | WS_BORDER | WS_VSCROLL | WS_HSCROLL | WS_TABSTOP,WS_EX_CLIENTEDGE | WS_EX_STATICEDGE

Vertical and Horizontal Scrollbar appears automatically when the text entered is more than the display area. This is working as expected.

I am having one clear button in my application which is to clear the text in rich edit control. But when i click the clear button vertical scrollbar disappears but the horizantal scrollbar is not disappearing.

Can anyone help me out in this?

when ever i click the clear button the below code will be exceuted.

CString strConsoleInit(_T("ADB SHELL COMMAND WINDOW \n\n"));
strConsoleInit += CONSOLE_DELIMITER;
m_ADBShellConsole.SetWindowTextW(strConsoleInit);
m_ADBShellConsole.SetReadOnly(false);

//Set the text length...
long nBegin = m_ADBShellConsole.GetTextLength();
//Get no of new line char...
int nIndex = 0;
int nCount = 0;
while(true)
{
    int nPos = strConsoleInit.Find(_T('\n'),nIndex);
    if(nPos < 0)
    {
        break;
    }
    ++nCount;
    nIndex = nPos + 1;
}
//Set the text length...
m_ADBShellConsole.SetConsoleTextLength(nBegin-nCount);
m_BtnClear.EnableWindow();
((CRAPC_AgentDlg *)m_ADBShellConsole.GetParent())->Invalidate();

I m setting the rich edit control text as below

ADB SHELL COMMAND WINDOW

INPUT COMMAND :