The following example uses a variety of thread-specific hook procedures to monitor the system for events affecting a thread. It demonstrates how to process events for the following types of hook procedures:
WH_CALLWNDPROC
WH_CBT
WH_DEBUG
WH_GETMESSAGE
WH_KEYBOARD
WH_MOUSE
WH_MSGFILTER
The user can install and remove a hook procedure by using the menu. When a hook procedure is installed and an event that is monitored by the procedure occurs, the procedure writes information about the event to the client area of the application's main window.
// Initialize structures with hook data. The menu-item
// identifiers are defined as 0 through 6 in the
// header file. They can be used to identify array
// elements both here and during the WM_COMMAND
// message.