Getting text from listbox

[publikum]

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?

[Stack Overflow]

Hello,

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

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

[publikum]

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

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); 
	 }

[jverkoey]

char *buf; either needs to be:

char buf[512];

or

char *buf=new char[512];

[publikum]

thanks

[Ken Fitlike]

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

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.