钩子初接触（二十八）
结构4：CWPSTRUCT Structure
The CWPSTRUCT structure defines the message parameters passed to a WH_CALLWNDPROC hook procedure, CallWndProc.
CWPSTRUCT 结构定义了传递给WH_CALLWNDPROC钩子子程CallWndProc的消息参数。
Syntax
typedef struct {
LPARAM lParam;
WPARAM wParam;
UINT message;
HWND hwnd;
} CWPSTRUCT, *PCWPSTRUCT;
Members
lParam / wParam
Specifies additional information about the message. The exact meaning depends on the message value. 指定消息的附加信息。附加的意义取决于message的值。
message
Specifies the message. 指定消息
hwnd
Handle to the window to receive the message. 接收消息的窗体的句柄。
结构5：DEBUGHOOKINFO Structure
The DEBUGHOOKINFO structure contains debugging information passed to a WH_DEBUG hook procedure, DebugProc.
DEBUGHOOKINFO结构包含有传递给WH_DEBUG钩子子程DebugProc的调试信息。
Syntax
typedef struct {
DWORD idThread;
DWORD idThreadInstaller;
LPARAM lParam;
WPARAM wParam;
int code;
} DEBUGHOOKINFO, *PDEBUGHOOKINFO;
Members成员
idThread
Handle to the thread containing the filter function. 包含过滤方法的线程的句柄。
idThreadInstaller
Handle to the thread that installed the debugging filter function. 安装调试过滤方法的线程的句柄。
lParam / wParam
Specifies the value to be passed to the hook in the lParam parameter of the DebugProc callback function. 指定在DebugProc回调函数的lParam/ wParam 参数中，要传递给钩子的值。
code
Specifies the value to be passed to the hook in the nCode parameter of the DebugProc callback function. 指定在DebugProc回调函数的nCode 参数中，要传递给钩子的值。
结构6：EVENTMSG Structure
The EVENTMSG structure contains information about a hardware message sent to the system message queue. This structure is used to store message information for the JournalPlaybackProc callback function.
该结构包含有关于硬件的消息，该消息被发送给系统的消息队列。该结构用来为JournalPlaybackProc回调函数存储消息的信息。
Syntax语法
typedef struct {
UINT message;
UINT paramL;
UINT paramH;
DWORD time;
HWND hwnd;
} EVENTMSG, *PEVENTMSG;
Members成员
message
Specifies the message. 指定消息。
paramH / paramH
Specifies additional information about the message. The exact meaning depends on the message value. 指定消息的附加信息。附加的意义取决于message的值。
time
Specifies the time at which the message was posted. 消息被传递时的时间 。
hwnd
Handle to the window to which the message was posted. 消息被传给的窗口的句柄。
Helios 2007-5-31