看看MSDN
LRESULT CALLBACK LowLevelMouseProc(
int nCode, // hook code
WPARAM wParam, // message identifier
LPARAM lParam // pointer to structure with message data
);
它下面有一句话
wParam
Specifies the identifier of the mouse message. This parameter can be one of the following messages:WM_LBUTTONDOWN,WM_LBUTTONUP,WM_MOUSEMOVE,WM_MOUSEWHEEL,WM_RBUTTONDOWN, orWM_RBUTTONUP.
看到没有
WM_MOUSEWHEEL
The WM_MOUSEWHEEL message is sent to the focus window when the mouse wheel is rotated. The DefWindowProc function propagates the message to the window's parent. There should be no internal forwarding of the message, since DefWindowProc propagates it up the parent chain until it finds a window that processes it.
WM_MOUSEWHEEL
fwKeys = LOWORD(wParam); // key flags
zDelta = (short) HIWORD(wParam); // wheel rotation
xPos = (short) LOWORD(lParam); // horizontal position of pointer
yPos = (short) HIWORD(lParam); // vertical position of pointer
Parameters
fwKeys
Value of the low-order word of wParam. Indicates whether various virtual keys are down. This parameter can be any combination of the following values: Value Description
MK_CONTROL Set if the ctrl key is down.
MK_LBUTTON Set if the left mouse button is down.
MK_MBUTTON Set if the middle mouse button is down.
MK_RBUTTON Set if the right mouse button is down.
MK_SHIFT Set if the shift key is down.
zDelta
The value of the high-order word of wParam. Indicates the distance that the wheel is rotated, expressed in multiples or divisions of WHEEL_DELTA, which is 120. A positive value indicates that the wheel was rotated forward, away from the user; a negative value indicates that the wheel was rotated backward, toward the user.
xPos
Value of the low-order word of lParam. Specifies the x-coordinate of the pointer, relative to the upper-left corner of the screen.
yPos
Value of the high-order word of lParam. Specifies the y-coordinate of the pointer, relative to the upper-left corner of the screen.
Remarks
The zDelta parameter will be a multiple of WHEEL_DELTA, which is set at 120. This is the threshold for action to be taken, and one such action (for example, scrolling one increment) should occur for each delta.
The delta was set to 120 to allow Microsoft or other vendors to build finer-resolution wheels in the future, including perhaps a freely-rotating wheel with no notches. The expectation is that such a device would send more messages per rotation, but with a smaller value in each message. To support this possibility, you should either add the incoming delta values until WHEEL_DELTA is reached (so for a given delta-rotation you get the same response), or scroll partial lines in response to the more frequent messages. You could also choose your scroll granularity and accumulate deltas until it is reached.
FROM MSDN The JournalRecordProc hook procedure is an application-defined or library-defined callback function used with the SetWindowsHookEx function. The function records messages the system removes from the system message queue. Later, an application can use a JournalPlaybackProc hook procedure to play back the messages.
//
// Note!
//
// If this DLL is dynamically linked against the MFC
// DLLs, any functions exported from this DLL which
// call into MFC must have the AFX_MANAGE_STATE macro
// added at the very beginning of the function.
//
// For example:
//
// extern "C" BOOL PASCAL EXPORT ExportedFunction()
// {
// AFX_MANAGE_STATE(AfxGetStaticModuleState());
// // normal function body here
// }
//
// It is very important that this macro appear in each
// function, prior to any calls into MFC. This means that
// it must appear as the first statement within the
// function, even before any object variable declarations
// as their constructors may generate calls into the MFC
// DLL.
//
// Please see MFC Technical Notes 33 and 58 for additional
// details.
//
BEGIN_MESSAGE_MAP(CGetMouseMessageApp, CWinApp)
//{{AFX_MSG_MAP(CGetMouseMessageApp)
// NOTE - the ClassWizard will add and remove mapping macros here.
// DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CGetMouseMessageApp construction
CGetMouseMessageApp::CGetMouseMessageApp()
{
// TODO: add construction code here,
// Place all significant initialization in InitInstance
}
/////////////////////////////////////////////////////////////////////////////
// The one and only CGetMouseMessageApp object
CGetMouseMessageApp theApp;
// 定义钩子变量
HHOOK g_hook = NULL;
extern "C" _declspec(dllexport) void EndHook(void);
// 低级鼠标钩子函数
LRESULT CALLBACK LowLevelMouseProc(
int nCode, // hook code
WPARAM wParam, // message identifier
LPARAM lParam // pointer to structure with message data
)
{
if (nCode == HC_ACTION)
{
// 如果是滚动滑轮，弹出消息框，卸载钩子函数
if (wParam == WM_MOUSEWHEEL)
{
MessageBox(NULL, "Get the mousewheel message", NULL, MB_OK);
EndHook();
}
}
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WM_MOUSEWHEEL cannot work ?
I downloaded and use it to test out Notepad.
It seems like the WM_MOUSEWHEEL can be recorded, but when it is played back in NotePad, the playback does not "wheel" or scroll the notepad app.
You can easily try it out in notepad. just type in many line to make Notepad scrollbar appear. Record the mouse wheel and play it back.
Any idea how to make Mouse Wheel work?
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Re: WM_MOUSEWHEEL cannot work ?
Yes, this is a bug in the journal playback system. Unfortunately, there's nothing I can do
导致修复软件问题时,好了这边坏了那边
