MOUSEHOOKSTRUCTEX structure (winuser.h)
Contains information about a mouse event passed to a WH_MOUSE hook procedure, MouseProc.
This is an extension of the MOUSEHOOKSTRUCT structure that includes information about wheel movement or the use of the X button.
Syntax
typedef struct tagMOUSEHOOKSTRUCTEX : tagMOUSEHOOKSTRUCT {
DWORD mouseData;
} MOUSEHOOKSTRUCTEX, *LPMOUSEHOOKSTRUCTEX, *PMOUSEHOOKSTRUCTEX;
Inheritance
The MOUSEHOOKSTRUCTEX structure implements tagMOUSEHOOKSTRUCT.
Members
mouseData
Type: DWORD
If the message is WM_MOUSEWHEEL, the HIWORD of this member is the wheel delta. The LOWORD is undefined and reserved. 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. One wheel click is defined as WHEEL_DELTA, which is 120.
If the message is WM_XBUTTONDOWN, WM_XBUTTONUP, WM_XBUTTONDBLCLK, WM_NCXBUTTONDOWN, WM_NCXBUTTONUP, or WM_NCXBUTTONDBLCLK, the HIWORD of mouseData specifies which X button was pressed or released, and the LOWORD is undefined and reserved. This member can be one or more of the following values. Otherwise, mouseData is not used.
| Value | Meaning |
|---|---|
|
The first X button was pressed or released. |
|
The second X button was pressed or released. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Header | winuser.h (include Windows.h) |
See also
Conceptual
Reference