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| TrackMouseEvent The TrackMouseEvent function posts messages when the mouse pointer leaves a window or hovers over a window for a specified amount of time. VB4-32,5,6
Declare Function TrackMouseEvent Lib "user32" (lpEventTrack As TRACKMOUSEEVENTTYPE) As Long |
| Operating Systems Supported |
| Requires Windows NT 4.0 or later; Requires Windows 98 or later |
· lpEventTrack
[in/out] Pointer to a TRACKMOUSEEVENT structure that contains tracking information. |
If the function succeeds, the return value is nonzero .
If the function fails, return value is zero. To get extended error information, call GetLastError.
The messages that the function can post are the following:
WM_MOUSEHOVER
The mouse hovered over the client area of the window for the period of time specified in a prior call to TrackMouseEvent. Hover tracking stops when this message is generated. The application must call TrackMouseEvent again if it requires further tracking of mouse hover behavior.
WM_MOUSELEAVE
The mouse left the client area of the window specified in a prior call to TrackMouseEvent. All tracking requested by TrackMouseEvent is canceled when this message is generated. The application must call TrackMouseEvent when the mouse re-enters its window if it requires further tracking of mouse hover behavior. |
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