validate data in a dialog box

This is a discussion on validate data in a dialog box within the Windows Programming forums, part of the Platform Specific Boards category; I am displaying a dialog box. On the dialog box I have some edit boxes, raidio buttons, static boxes, push ...

  1. #1
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    validate data in a dialog box

    I am displaying a dialog box. On the dialog box I have some edit boxes, raidio buttons, static boxes, push buttons, and check boxes.

    The user enters some information in the edit boxes and clicks on the "Submit" push button.

    Once the Submit button is pushed I validate the data that was just entered. If it is OK the program continues if not I want to return focus to the edit box that is invalid and allow the user to correct the error.

    This is my problem. How can I return focus back to the edit box that is bad, let the user correct the problem, and then push Submit again? Once the Submit button is pushed I again want to validate the data.

    I am new at this so any help you have would be great.

    Thanks,

  2. #2
    Registered User Dohojar's Avatar
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    Code:
    if (data invalid)
       SetFocus(GetDlgItem(hwnd,editboxID));
    I think this might help ya out.
    Dohojar Moajbuj
    Time is the greatest teacher, too bad it kills all its students

  3. #3
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    I added the following code
    Code:
     
    if (intMonths < 1 || intMonths > 999) 
             SetFocus(GetDlgItem(hwnd, IDC_EDIT_NUM_MONTHS));
    but was getting a couple of errors.
    error C2065: 'hwnd' : undeclared identifier
    and
    error C2660: 'SetFocus' : function does not take 1 parameters

    I haven't covered handles yet so I'm not really sure what the first error is telling me and I know SetFocus does take 1 parameter, which is what I am passing it.

    Thanks,

  4. #4
    Registered User Dohojar's Avatar
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    I haven't covered handles yet so I'm not really sure what the first error is telling me
    Well the handle in this case is a handle for your window/dialog. Your main windows proceedure looks like this:
    Code:
    LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
    or something similar. The Dialog proceedure kinda look the same except the HWND would be a handle to your dialog and a dialog proceedure returns a BOOL type. I was passing SetFocus() a HWND called hwnd. That is just a name I use for it so you probably have yours named differently and that is why you are getting an error. I was just using it as an example. Maybe I should have said it like this:
    Code:
    LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
    HWND EditboxYouWant;  
    if(dataNotValid)
    {
       EditboxYouWant = GetDlgItem(hwnd,IDC_EDIT_NUM_MONTHS);
       SetFocus(EditboxYouWant);
    }
    Hope this helps you
    Dohojar Moajbuj
    Time is the greatest teacher, too bad it kills all its students

  5. #5
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    Thanks, I'll try it.

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