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POHow do I get a multi line tooltip in MFC
 

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  1. POHow do I get a multi line tooltip in MFC
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    <p>Right now, I have a tool tip that pops up when I hover over an edit box. The problem is that this tool tip contains multiple error messages and they are all in one long line. I need to have each error message be on its own line. The error messages are contained in a CString with a new line seperating them.</p> <p>My existing code is below.</p> <pre><code>BOOL OnToolTipText(UINT, NMHDR* pNMHDR, LRESULT* pResult) { ASSERT(pNMHDR-&gt;code == TTN_NEEDTEXTA || pNMHDR-&gt;code == TTN_NEEDTEXTW); // need to handle both ANSI and UNICODE versions of the message TOOLTIPTEXTA* pTTTA = (TOOLTIPTEXTA*)pNMHDR; TOOLTIPTEXTW* pTTTW = (TOOLTIPTEXTW*)pNMHDR; // TCHAR szFullText[256]; CString strTipText=_T(""); UINT nID = pNMHDR-&gt;idFrom; if (pNMHDR-&gt;code == TTN_NEEDTEXTA &amp;&amp; (pTTTA-&gt;uFlags &amp; TTF_IDISHWND) || pNMHDR-&gt;code == TTN_NEEDTEXTW &amp;&amp; (pTTTW-&gt;uFlags &amp; TTF_IDISHWND)) { // idFrom is actually the HWND of the tool nID = ::GetDlgCtrlID((HWND)nID); } //m_errProjAccel[ch] contains 1 or more error messages each seperated by a new line. if((int)nID &gt;= ID_PROJECTED_ACCEL1 &amp;&amp; (int)nID &lt; ID_PROJECTED_ACCEL1 + PROJECTED_ROWS -1 ) { int ch = nID - ID_PROJECTED_ACCEL1; strTipText = m_errProjAccel[ch]; } #ifndef _UNICODE if (pNMHDR-&gt;code == TTN_NEEDTEXTA) lstrcpyn(pTTTA-&gt;szText, strTipText, sizeof(pTTTA-&gt;szText)/sizeof(pTTTA-&gt;szText[0])); else _mbstowcsz(pTTTW-&gt;szText, strTipText, sizeof(pTTTA-&gt;szText)/sizeof(pTTTA-&gt;szText[0])); #else if (pNMHDR-&gt;code == TTN_NEEDTEXTA) _wcstombsz(pTTTA-&gt;szText, strTipText, sizeof(pTTTA-&gt;szText)/sizeof(pTTTA-&gt;szText[0])); else lstrcpyn(pTTTW-&gt;szText, strTipText, sizeof(pTTTA-&gt;szText)/sizeof(pTTTA-&gt;szText[0])); #endif *pResult = 0; // bring the tooltip window above other popup windows ::SetWindowPos(pNMHDR-&gt;hwndFrom, HWND_TOP, 0, 0, 0, 0, SWP_NOACTIVATE|SWP_NOSIZE|SWP_NOMOVE|SWP_NOOWNERZORDER); return TRUE; // message was handled } </code></pre>
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