The Wm_mouseleave and wm_mousehover of the edit box are used

Resources

Http://www.cnblogs.com/weiqubo/archive/2011/04/14/2016323.html

Recent work needs, need to customize the edit box, rewrite the edit box CEdit class.

I want to do one. When the mouse moves in the input box is highlighted, leaving time-varying back.

When you want to rewrite the Wm_mouseleave and wm_mousehover two messages, the mouse move in and out of the message is not executed.

The reason is that Windows do not respond to Wm_mouseleave and wm_mousehover messages by default, so use the _trackmouseevent function to activate these two messages. After this function is called, the function posts the two messages to the specified window when the mouse is over a specified window for more than a certain amount of time or after leaving the window.

How to use:
1. Define a variable in the dialog class to identify whether to track the current mouse state, the reason for this definition is to avoid the mouse is already on the form, a mobile mouse will repeatedly produce wm_mousehover.
BOOL _bmousetrack=true;

2. Call the _trackmouseevent function in OnMouseMove
if (_bmousetrack)//If tracing is allowed, then.
{
TrackMouseEvent Cstme;
cstme.cbsize = sizeof (CSTME);
Cstme.dwflags = tme_leave| Tme_hover;
Cstme.hwndtrack = m_hwnd;//Specify the window to be traced
Cstme.dwhovertime = 10; The mouse on the button to stay more than 10ms, it is considered the status of HOVER
:: _trackmouseevent (&CSTME); Turn on Windows Wm_mouseleave, Wm_mousehover event support

_bmousetrack=false; If it's been traced, stop tracking.
}

(#add excerpt from msdn:the _trackmouseevent function posts messages when the mouse pointer leaves a window or hovers over A window for a specified amount of time. This function calls trackmouseevent if it exists, otherwise it emulates it.)
3. Allow tracking of mouse state again in OnMouseLeave
_bmousetrack=true;

4. Note: These two messages are mapped to their own writing
On_message (Wm_mousehover,onmousehover)
On_message (Wm_mouseleave,onmouseleave)

Note: You can also use the following code in the PreTranslateMessage function to receive, do not need to write their own wm_mouselease and Wm_mousehover message response function (of course you have to write it yourself):
if (pmsg-> message==wm_mouseleave)
AfxMessageBox ("mouse Leave");

else if (pmsg->message = = wm_mousehover)

Afxmessagebos ("mouse Leave");

Return CDialog::P retranslatemessage (PMSG);

The Wm_mouseleave and wm_mousehover of the edit box are used