WM_NCHITTEST и его сообщения?

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VuDZ (2002-02-06 16:08) [6]

Platform SDK: Windows User Interface
WM_NCMOUSEHOVER
The WM_NCMOUSEHOVER message is posted to a window when the cursor hovers over the nonclient area of the window for the period of time specified in a prior call to TrackMouseEvent.

A window receives this message through its WindowProc function.

LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // WM_NCMOUSEHOVER
WPARAM wParam, // hit-test value
LPARAM lParam // cursor position
);
Parameters
wParam
Specifies the hit-test value returned by the DefWindowProc function as a result of processing the WM_NCHITTEST message. For a list of hit-test values, see WM_NCHITTEST.
lParam
Specifies a POINTS structure that contains the x- and y-coordinates of the cursor. The coordinates are relative to the upper-left corner of the screen.
Return Values
If an application processes this message, it should return zero.

Remarks
Hover tracking stops when this message is generated. The application must call TrackMouseEvent again if it requires further tracking of mouse hover behavior.

You can also use the GET_X_LPARAM and GET_Y_LPARAM macros to extract the values of the x- and y- coordinates from lParam.

xPos = GET_X_LPARAM(lParam);
yPos = GET_Y_LPARAM(lParam);
Requirements
Windows NT/2000 or later: Requires Windows 2000 or later.
Windows 95/98/Me: Requires Windows 98 or later.
Header: Declared in Winuser.h; include Windows.h.

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