getting a Double with GetDlgItemInt

This is a discussion on getting a Double with GetDlgItemInt within the Windows Programming forums, part of the Platform Specific Boards category; My problem is pretty simple have an app when i need to be able to get Decimel number from an ...

  1. #1
    Wen Resu
    Join Date
    May 2003
    Posts
    219

    getting a Double with GetDlgItemInt

    My problem is pretty simple
    have an app when i need to be able to get Decimel number from an edit control, i am trying to do this using the GetDlgItemInt function, which by itsn ame and by testing seems to only work for ints.
    Process would be
    User enters number hits button IE 4.23->
    Code:
    i do  
    double ViNum = GetDlgItemInt(hwnd, IDC_VI, &ViSuccess, FALSE); 
    then i do
    if (ViSuccess  && TSuccess  && !DSuccess && !DFound) {
       stevenfritz("Use 1 to find D", "Notice"); // debug code
       DNum = Dis1(ViNum, TNum, ANum);
       DFound = TRUE;
       SetDlgItemInt(hwnd, IDC_D, DNum, TRUE );
    
          }
    Despite my Searching with google and MSDN i can't find a suitable function to do this for me, and i hope to be able to do this without doign it by hand
    Any help is much appreceated
    Last edited by Iamien; 09-16-2003 at 05:15 PM.

  2. #2
    Wen Resu
    Join Date
    May 2003
    Posts
    219
    good old atof()
    Code:
     char* ViStr;
     int len = GetWindowTextLength(GetDlgItem(hwnd, IDC_VI));
     ViStr = (char*)GlobalAlloc(GPTR, len + 1);
     GetDlgItemText(hwnd, IDC_VI, ViStr, len + 1);
     ViNum = atof(ViStr);

  3. #3
    C++ Developer XSquared's Avatar
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    Ontario, Canada
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    2,718
    sscanf is better.
    Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun pressing the search button after typing four whole words! - Quzah

    You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie

  4. #4
    Wen Resu
    Join Date
    May 2003
    Posts
    219
    aaah stop making me rewrite code with faster stuff you evil man! :P
    ah well smal lrewrite of couple functions

  5. #5
    train spotter
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    GetDlgItemText(hwnd, IDC_VI, ViStr, len + 1);

    I think you ment

    GetDlgItemText(hwnd, IDC_VI, ViStr, len);
    "Man alone suffers so excruciatingly in the world that he was compelled to invent laughter."
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