Getting text from listbox

I have small problem...I have a listbox in a dialog, and I managed to control double clicks - but how can I get the value of string that was double-clicked?

Hello,

Possibly by using SetDlgItemMessage() And LB_GETCURSEL, LB_GETTEXT options. For example:

Code:

---

int sel;

sel = SendDlgItemMessage( hWnd, IDC_LIST, LB_GETCURSEL, 0, 0 );
SendDlgItemMessage( hWnd, IDC_LIST, LB_GETTEXT, sel, (LPARAM)selection );

---

Where IDC_LIST represents your ListBox.


- Stack Overflow

It just doesn't work (well, it works but it fills the buffer with some strange text...) :(

Code:

Code:

---


        char *buf;
        int sel;
        if(HIWORD(wParam) == LBN_DBLCLK)
        {
        sel = SendDlgItemMessage(hwnd, IDC_LST1, LB_GETCURSEL, 0, 0);
        SendDlgItemMessage(hwnd, IDC_LST1, LB_GETTEXT, sel, (LPARAM)buf);       
        MessageBox(hwnd, buf, "Nekaj", MB_OK | MB_ICONINFORMATION);
        }

---

char *buf; either needs to be:

Code:

---

char buf[512];

---

or

Code:

---

char *buf=new char[512];

---

thanks ;)

You need to allocate memory for the LB_GETTEXT message to use:

Code:

---

char buf[SOME_SUITABLE_SIZE];
int sel;
if(HIWORD(wParam) == LBN_DBLCLK)
  {
  sel = SendDlgItemMessage(hwnd, IDC_LST1, LB_GETCURSEL, 0, 0);
  SendDlgItemMessage(hwnd, IDC_LST1, LB_GETTEXT, sel, (LPARAM)buf);   
  MessageBox(hwnd, buf, "Nekaj", MB_OK | MB_ICONINFORMATION);
  }

---

If you know the maximum length of any item in the listbox in question then use that value as SOME_SUITABLE_SIZE. If you prefer to dynamically allocate memory for the buffer then LB_GETTEXTLEN will return the length of a listbox item which you can use to new or malloc a suitable sized buffer.

edit: well biffed by jverkoey.