Re: A question about CToolTipCtrl.

From:

"AliR $VC++ MVP$" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 18 May 2007 16:09:22 GMT

Message-ID:

<Sck3i.6440$RX.6286@newssvr11.news.prodigy.net>

The reason you need to do this is because disabled windows don't receive
input messages therefore the input messages that would normally be processed
by the child control gets processed by the parent window, so the tool tip
control won't get notification to display the tooltip.

Here is a blog about it.
http://blogs.msdn.com/oldnewthing/archive/2007/04/05/2028099.aspx

So what we have to do to get around this problem is when the parent window
gets a mouse move message that belongs to a child control, but it is getting
received by the parent because the control is disabled, we will rig things
so that it looks like its a message is for the control, by changing the hwnd
and the coordinates.

AliR.

"fiveight" <fiveight@tom.com> wrote in message
news:BA2BDF3D-55C8-41A5-B1B2-10BCFA540DEC@microsoft.com...

Thanks!
Could you explain the reason for me?

"AliR (VC++ MVP)" <AliR@online.nospam> ????????
news:He%2i.2986$y_7.1840@newssvr27.news.prodigy.net...

In your Dialogs PreTranslateMessage method where you are calling
m_ToolTip.RelayEvent(...)

Change it to this:

MSG msg = *pMsg;
msg.hwnd = (HWND)m_ToolTip.SendMessage(TTM_WINDOWFROMPOINT, 0,
(LPARAM)&msg.pt);
CPoint pt = pMsg->pt;
if (msg.message >= WM_MOUSEFIRST && msg.message <= WM_MOUSELAST)
::ScreenToClient(msg.hwnd, &pt);
msg.lParam = MAKELONG(pt.x, pt.y);

// Let the ToolTip process this message.
m_ToolTip.RelayEvent(&msg);

AliR.

"fiveight" <fiveight@tom.com> wrote in message
news:CED1EB4E-A29B-42E8-AD7B-F496777F5165@microsoft.com...

Hi All:

Chinese English following!

I add a CToolTipCtrl member in my dialog, and create it in OnInitDialog
function, at last, I add a CEdit control to CToolTipCtrl member.When the
CEdit control is enabled, tool tip can pop up normally, but when the
CEdit control is disabled, tool tip can't pop up. How can I solve this
problem? Thanks.

Fiveight