C / C++ / MFC

BOOL IsDouble(LPCTSTR lpStr)
{
    BOOL bHasPoint = FALSE; // Already has a point?
    const int LEN = _tcslen(lpStr);
    for (int i = 0; i < LEN; i++)
    {
        if (lpStr[i] < _T('0') || lpStr[i] > _T('9'))
        {
            // Not a digit, then what it is?
            if (lpStr[i] == _T('+') || lpStr[i] == _T('-'))
            {
                // if there's a sign, it must be the leading char
                if (i != 0)
                {
                    return FALSE;
                }
            }            
            else if (lpStr[i] == _T('.'))
            {
                if (bHasPoint
                    || i == 0
                    || i == LEN - 1
                    || (lpStr[i - 1] < _T('0') || lpStr[i - 1] > _T('9')))
                {
                    // point can occur only once,
                    // point must not be the leading char
                    // point must not be the last char
                    // point must follow a digit
                    return FALSE; 
                }
                else
                {
                    bHasPoint = TRUE;
                }
            }
            else
            {
                return FALSE; // definitely not a double
            }            
        }
    }
    return TRUE; // Validated
}

SetClassLong(hWnd, GCL_HICON, (LONG) LoadIcon(hinst, MAKEINTRESOURCE(IDC_MYICON))); 

m_hIcon = AfxGetApp->LoadIcon(IDI_Your_Icon); //Store the handle to the icon<br />
SetIcon(m_hIcon, TRUE);  //Set the big (?) icon<br />
SetIcon(m_hIcon, FALSE); //Set the small (??) icon

template <class BASE>
class CBWnd : public BASE {
public:
CBWnd(){};
template <typename T0> CBwnd(const T0& t0):BASE(to){}
template <typename T0,typename T1> CBwnd(const T0& t0,const T1&t1):BASE(t0,t1){}
template <typename T0,typename T1,typename T2> CBwnd(const T0& t0,const T1& t1,const T2& t2):BASE(t0,t1,t2){}
// add more like this if necessary
};