The DEBUGHOOKINFO structure contains debugging information passed to a WH_DEBUG hook procedure, DebugProc.
typedef struct tagDEBUGHOOKINFO { // dh
DWORD idThread;
DWORD idThreadInstaller;
LPARAM lParam;
WPARAM wParam;
int code;
} DEBUGHOOKINFO;
Windows NT: Requires version 3.1 or later.
Windows: Unsupported.
Windows CE: Unsupported.
Header: Declared in winuser.h.
Hooks Overview, Hook Structures, DebugProc, SetWindowsHookEx