typedef struct tagHARDWAREHOOKSTRUCT { /* hhs */
HWND hWnd;
UINT wMessage;
WPARAM wParam;
LPARAM lParam;
} HARDWAREHOOKSTRUCT;
The HARDWAREHOOKSTRUCT contains information about a hardware message placed in the system message queue.
hWnd
Identifies the window that will receive the message.
wMessage
Specifies the message identifier.
wParam
Specifies additional information about the message. The exact meaning depends on the wMessage parameter.
lParam
Specifies additional information about the message. The exact meaning depends on the wMessage parameter.