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<title>Controls - Eating returns in a single line edit</title>
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<h3 align="center"><font COLOR="#AOAO99">Eating returns in a single line edit</font></h3>

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<p>This code was contributed by <a HREF="mailto:Petr.Novotny@antek.cz">Petr Novotny</a>

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<p>I was quite frustrated in my app - I have a dialog with a few 
single-line edit controls; after updating the edits, when I pressed 
Enter the dialog was closed (IDOK was the default button).
"Want return" option is unfortunately valid only for multiline edits.</p>

<p>Here is my fix:</p>
<p>I override PreTranslateMessage. If there is WM_KEYDOWN with VK_ENTER 
going to the edit, I set the focus to the default button and discard 
the message. If the dialog has no defualt button, I let VK_ENTER 
through - no problem this time.</p>

<p>I check if the window is an editbox by calling GetClassName and 
comparing the return value to "Edit". There are much more 
possibilities - comparing the FromHandle(hwnd) to array of CWnd*, to 
array of IDs (comparing to GetDlgItem() return values) etc.</p>

<p>For the code to be completely correct, it should check for the edit's 
windows style and it should not act if it is multi-line, want-return 
edit. [I haven't done that as I don't use multiline edits.]</p>

<p>1. To your override of CDialog, add the following method:</p>
<pre><tt><FONT COLOR="#990000">
	virtual BOOL PreTranslateMessage(MSG *);
</pre></tt></font>

<p>2. Implement this function, for example:</p>

<pre><tt><FONT COLOR="#990000">
BOOL CMyDialog::PreTranslateMessage(MSG *pMsg)
{
	if (pMsg->message==WM_KEYDOWN &amp;&amp; pMsg->wParam==VK_RETURN)
	{
		DWORD def_id=GetDefID();
		if (def_id!=0)
		{
			CWnd *wnd=FromHandle(pMsg-&gt;hwnd);
			// you may implement other ways of testing, e.g.
			//  comparing to array of CWnd*, comparing to array of IDs etc.
			char class_name[16];
			if (GetClassName(wnd->GetSafeHwnd(),class_name,sizeof(class_name))!=0)
			{
				if (strnicmp(class_name,"edit",5)==0)
				{
					GetDlgItem(LOWORD(def_id))-&gt;SetFocus();
					return TRUE;
					// discard the message!
				}
			}
		}
	}
	// be a good citizen - call the base class
	return CDialog::PreTranslateMessage(pMsg);
}
</pre></tt></font>

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<p>Posted on: April 11, 98. </p>

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