How do I get a multi line tooltip in MFC

Question

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. My existing code is below. ``` BOOL OnToolTipText(UINT, NMHDR* pNMHDR, LRESULT* pResult) { ASSERT(pNMHDR->code == TTN_NEEDTEXTA || pNMHDR->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->idFrom; if (pNMHDR->code == TTN_NEEDTEXTA && (pTTTA->uFlags & TTF_IDISHWND) || pNMHDR->code == TTN_NEEDTEXTW && (pTTTW->uFlags & 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…

Accepted Answer

Creating multiline tooltips is explained here in the MSDN library - read the "Implementing Multiline ToolTips" section. You should send a `TTM_SETMAXTIPWIDTH` message to the ToolTip control in response to a `TTN_GETDISPINFO` notification to force it to use multiple lines. In your string you should separate lines with `
`.

Also, if your text is more than 80 characters, you should use the `lpszText` member of the `NMTTDISPINFO` structure instead of copying into the `szText` array.

How do I get a multi line tooltip in MFC

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