Why the variable in statictext tool in mfc is undefined - c++

Question

I create a static text in a mfc dialog, then I change variable of this static text into CString type and member name is a m_process.
Then, I will use this static text to show the time process, but the identifier not defined.
int64 tm1 = cv::getTickCount();
int64 tm2 = cv::getTickCount();
double sec = (tm2-tm1)/cv::getTickFrequency();
teks.Format(_T("%g"),sec);
m_process.SetWindowTextW(teks);
and this is the error
Error 9 error C2065: 'm_process' : undeclared identifier d:\kuliah\smt 8\bismillah ta\bismillah_dialog\bismillah_dialog\bismillah_dialogdlg.cpp 391 1 Bismillah_Dialog
Error 4 error C2228: left of '.SetWindowTextW' must have class/struct/union d:\kuliah\smt 8\bismillah ta\bismillah_dialog\bismillah_dialog\bismillah_dialogdlg.cpp 268 1 Bismillah_Dialog
this is the declaration of this static text.
in Dlg.cpp
CBismillah_DialogDlg::CBismillah_DialogDlg(CWnd* pParent /*=NULL*/)
: CDialogEx(CBismillah_DialogDlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
modeTampil = 0;
openProcess = 0;
modeAuto = 0;
m_area = _T("");
m_process = _T("");
}
void CBismillah_DialogDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
// DDX_Control(pDX, IDC_EDIT1, m_area);
// DDX_Control(pDX, IDC_EDIT2, m_process);
DDX_Control(pDX, IDC_BUTTON2, m_play);
DDX_Control(pDX, IDC_BUTTON1, m_open);
// DDX_Control(pDX, ID_STATIC, m_pic);
DDX_Control(pDX, ID_STATIC, m_pic);
DDX_Control(pDX, IDC_MFCEDITBROWSE1, m_name);
// DDX_Control(pDX, IDC_EDIT3, m_coba);
// DDX_Control(pDX, IDC_EDIT1, m_area);
DDX_Text(pDX, IDC_EDIT1, m_area);
DDX_Text(pDX, IDC_EDIT2, m_process);
}
and in the header file.
public:
CWinThread* thread;
afx_msg void OnEnChangeMfceditbrowse1();
int modeTampil;
int openProcess;
int modeAuto;
static DWORD ThreadPro(LPVOID *x);
afx_msg void threadProcess();
// CStatic m_area;
// CStatic m_process;
CButton m_play;
CButton m_open;
// CStatic m_pic;
CStatic m_pic;
afx_msg void OnBnClickedButton1();
CMFCEditBrowseCtrl m_name;
// CEdit m_coba;
// CStatic m_area;
CString m_area;
CString m_process;
};
The system already declared the static text, but it is not detect when I build this program.
I dont know how to solved it. I'm very confused, and newbie to this MFC. I'm very very need help. thank you :))

Answer 1

Given your code provided, the UI control is mapped to a CString and not to a CEdit.
Therefore, you can't use SetWindowTextW as CString is not a control object.
In your can just use:
m_process.Format(_T("%g"),sec);
UpdateData(FALSE);
I am not saying this is the most efficient way. But it works with your stated code. There are other ways to transfer control content to variables (for example: SetDlgItemText) but this is how I do it. No doubt there are even more methods.