C / C++ / MFC

void CActivationDlg::OnBnClickedCMask()
{
	UpdateData(TRUE);

	m_bMask = m_bMask ? TRUE : FALSE;

	// preserve original control's state.
	CFont* pFont = m_cKey.GetFont();
	int nLen = m_strKey.GetLength();
	TCHAR* pSaveText = new TCHAR[m_strKey.GetLength()+1];
	GetWindowText(pSaveText, nLen+1);

	DWORD dwStyle = GetWindowLong(m_cKey.GetSafeHwnd(), GWL_STYLE);

	if(!m_bMask) // Remove password mask
		dwStyle &= ~ES_PASSWORD;
	else		// Add password mask
        dwStyle |= ES_PASSWORD;

	// create new edit control with appropriate style and size.
	CActivationDlg* pParent = (CActivationDlg*)m_cKey.GetParent();
	
	CRect rect;
	m_cKey.GetWindowRect(rect);
	pParent->ScreenToClient(rect);

	UINT nID = m_cKey.GetDlgCtrlID();

	HWND hWnd = ::CreateWindowEx(WS_EX_CLIENTEDGE, _T("edit"), NULL, dwStyle,
		rect.left, rect.top, rect.right-rect.left, rect.bottom-rect.top,
		pParent->m_hWnd, (HMENU)nID, AfxGetInstanceHandle(), NULL);

	if (hWnd == NULL)
	{
		delete[] pSaveText;
		return;
	}

	// set the window text to nothing to make sure following set doesn't fail
	m_cKey.SetWindowText(NULL);

	// restore visual state
	::SetWindowText(hWnd, pSaveText);
	delete[] pSaveText;
	if (pFont != NULL)
	{
		ASSERT(pFont->m_hObject != NULL);
		::SendMessage(hWnd, WM_SETFONT, (WPARAM)pFont->m_hObject, 0);
	}

	// detach old window, attach new
	SetDlgCtrlID(nID+1);
	HWND hWndOld = m_cKey.Detach();
	::SetWindowLong(hWndOld, GWL_WNDPROC, (LONG)*GetSuperWndProcAddr());
	ASSERT(m_cKey.m_hWnd == NULL);
	m_cKey.SubclassWindow(hWnd);
	ASSERT(m_cKey.m_hWnd == hWnd);

	UINT nTabStops = 7;
	m_cKey.SetTabStops(nTabStops);

	m_cKey.GetClientRect(&rect);
	m_cKey.SetWindowPos(NULL, 0, 0, 0, 0,
		SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE|SWP_NOZORDER|SWP_SHOWWINDOW);
	
	m_cKey.UpdateWindow();

	// destroy old
	::SetWindowPos(hWndOld, NULL, 0, 0, 0, 0,
		SWP_HIDEWINDOW|SWP_NOREDRAW|SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE|
		SWP_NOZORDER);
	::DestroyWindow(hWndOld);

	UpdateData(FALSE);
}

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

CHEICKNA TRAORE wrote:

just an error while i tried to post my message. I received error updating...

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

HANDLE hPort = CreateFile("\\\\.\\COM1", ..., OPEN_EXISTING, ...);
ReadFile(hPort, ...);

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb