Edit Boxes, I need specifics..

[MrWizard]

I have about 10 edit boxes in a dialog box. I can have people enter strings into them and retrieve them no problem. I need to limit them to only one character though. Right now I can OBTAIN the first character if the enter a bunch but I don't want to display the other keys they hit just the first. This is for a key configuration setup in a game I am writing. Also, I assume I need to use sub-classing and give the edit controls their own wndproc so I can catch keyup messages for each key they press? Because I need to know if they hit TAB and want that as one of their buttons. I also need to write TAB in the box in that case. Just wondering the best approach to this. Thanks in advance.

[Fordy]

You could try sending the edit a EM_SETLIMITTEXT message to set the maximum amount of chars

[MrWizard]

Ah, ok that would probably do the trick! There are a lot of these those as I stated but oh well. Also, Fordy, do you have know of any good sites with win32 sub-classing tutorials? I tried google but came up empty handed.

[Fordy]

Originally posted by MrWizard
Also, Fordy, do you have know of any good sites with win32 sub-classing tutorials? I tried google but came up empty handed.

Not really.......there's stuff on this board......lookup the function SetWindowLong on the search..

Also, this was on my SDK docs and should give a little idea

WNDPROC wpOrigEditProc; 
 
LRESULT APIENTRY EditBoxProc(
    HWND hwndDlg, 
    UINT uMsg, 
    WPARAM wParam, 
    LPARAM lParam) 
{ 
    HWND hwndEdit; 
 
    switch(uMsg) 
    { 
        case WM_INITDIALOG: 
            // Retrieve the handle to the edit control. 
            hwndEdit = GetDlgItem(hwndDlg, ID_EDIT); 
 
            // Subclass the edit control. 
            wpOrigEditProc = (WNDPROC) SetWindowLong(hwndEdit, 
                GWL_WNDPROC, (LONG) EditSubclassProc); 
            // 
            // Continue the initialization procedure. 
            // 
            return TRUE; 
 
        case WM_DESTROY: 
            // Remove the subclass from the edit control. 
            SetWindowLong(hwndEdit, GWL_WNDPROC, 
                (LONG) wpOrigEditProc); 
            // 
            // Continue the cleanup procedure. 
            // 
            break; 
    } 
    return FALSE; 
        UNREFERENCED_PARAMETER(lParam); 
} 
 
// Subclass procedure 
LRESULT APIENTRY EditSubclassProc(
    HWND hwnd, 
    UINT uMsg, 
    WPARAM wParam, 
    LPARAM lParam) 
{ 
    if (uMsg == WM_GETDLGCODE) 
        return DLGC_WANTALLKEYS; 
 
    return CallWindowProc(wpOrigEditProc, hwnd, uMsg, 
        wParam, lParam); 
}

[MrWizard]

Originally posted by Fordy

if (uMsg == WM_GETDLGCODE) 
        return DLGC_WANTALLKEYS; 
 
    return CallWindowProc(wpOrigEditProc, hwnd, uMsg, 
        wParam, lParam); 
}

Yes, This is perfect! Thank you very much.