If the target window is owned by the current process, GetWindowText causes a WM_GETTEXT message to be sent to the specified window or control. This function cannot retrieve the text of an edit control in another application. To get extended error information, call GetLastError. If the window has no title bar or text, if the title bar is empty, or if the window or control handle is invalid, the return value is zero. If the function succeeds, the return value is the length, in characters, of the copied string, not including the terminating null character. If the text exceeds this limit, it is truncated. The maximum number of characters to copy to the buffer, including the null character. If the string is as long or longer than the buffer, the string is truncated and terminated with a null character. Syntax int GetWindowTextA(Ī handle to the window or control containing the text. However, GetWindowText cannot retrieve the text of a control in another application. If the specified window is a control, the text of the control is copied. If you're going to need that functionality regularly, say on multiple dialogs, then you may as well subclass your own CEdit-derived class for doing the getting, setting and validation work.Copies the text of the specified window's title bar (if it has one) into a buffer. Because I always got confused which call did which direction, you could introduce an enum to make it more readable, like so (maybe in stdafx.h or some central header): enum UpdateDataDirectionĪnd you would just have to write: UpdateData(FromVariablesToControls) So I had an idea for people who like readability. Upon re-reading my answer, I noticed that UpdateData(.) needs a BOOL variable - corrected.

To do it the other way around - from the variables in the controls. In order to write the values from the controls into the variables. Whereas m_iNumber is a member of your CYourAwesomeDialog class. Try this: void CYourAwesomeDialog::DoDataExchange(CDataExchange* pDX)ĭDX_Text(pDX, IDC_EDIT_NUMBER, m_iNumber) all you need to do is to convert it into int/double/whateverīesides the GetWindowText method already mentioned, you can also bind it via DDX to an integer/unsigned integer/double/float value. here text should contain the numeric value CEdit derives from CWnd, so it has a member function called GetWindowText which you can call to get the text in the CEdit, and then convert that into numeric type, int or double - depending on what you expect user to enter: CString text

Set cstring getwindowtext