Window list

Hi im trying to enumerate through opened windows(20 in this case) and dump their names in a listbox. Though i get a blank str always. How to fix it? Thanx.

Code:

---

    for(int i=0; i<20; i++)
    {
        CWnd *cwnd = GetNextWindow();
        CString str;
        cwnd->GetWindowText(str);
        m_clbWndList.AddString(str);
    }

---

'GetWindowText' wears 3 arguments (in order): handle to the window to work with, buffer, and buffer size, can do something like that:

Code:

---

char bff[512];
GetWindowText(chwnd,bff,sizeof(bff));

---

Hope that helps
Niara

>> 'GetWindowText' wears 3 arguments
And CWnd::GetWindowText wears 2 or 1.

http://msdn.microsoft.com/en-us/library/ms633520.aspx
See Remarks. You may have to send WM_GETTEXT directly.

gg

i did above both, still i get the empty string.

Code:

---

CWnd *cwnd = GetNextWindow();
char str[512]="\0";
::SendMessage(cwnd->m_hWnd,WM_GETTEXT,0, (LPARAM)str);

---

??

Codeplug: thank's to notice the error :)

geek@02: now yes, WM_GETTEXT wears 2 args :) in order the buffer size and the buffer, so maybe the trick will be:

Code:

---

CWnd *cwnd = GetNextWindow();
char str[512]="\0";
::SendMessage(cwnd->m_hWnd,WM_GETTEXT,(WPARAM)512, (LPARAM)str);

---

Hope that helps
Niara

Check the return, which should be the length of the string returned. If zero call GetLastError().

That should tell you if the window has no title, is a another windows control or an error occured [ERROR_SUCCESS == 0].