typedef struct tagCWPSTRUCT { /* cwps */
LPARAM lParam;
WPARAM wParam;
DWORD message;
HWND hwnd;
} CWPSTRUCT;
The CWPSTRUCT structure defines the message parameters passed to a WH_CALLWNDPROC hook.
lParam
Specifies additional information about the message. The exact meaning depends on the message value.
wParam
Specifies additional information about the message. The exact meaning depends on the message value.
message
Specifies the message number.
hwnd
Identifies the window that receives the message.
SetWindowsHook,SetWindowsHookEx