关于窗口句柄

CString strName("");// got caption

CWnd *  cw = GetParent();

cw->GetWindowText(strName); //got the caption of father's window

CWnd *  cwd = GetDlgItem(IDC_BUTTON1);

cwd->GetWindowText(strName); //got the caption ofIDC_BUTTON1

CWnd *  pWnd = GetActiveWindow();

pWnd ->GetWindowText(strName); //got the caption of  activewindow, also means the current window.