Source code of Windows XP (NT5)
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/****************************************************************************
PROGRAM: SECEDIT.C
PURPOSE: Displays the usrs current token and eventually allows the user
to edit parts of it.
****************************************************************************/
#include "hookdll.h"
/****************************************************************************
FUNCTION: KeyboardHookProc
PURPOSE: Handles keyboard input
RETURNS: 1 if message should be discarded, 0 for normal processing
****************************************************************************/
LRESULT
APIENTRY
KeyboardHookProc(
INT nCode,
WPARAM wParam,
LPARAM lParam
)
{
HWND hwndNotify;
HWND hwndEdit;
if (nCode < 0) {
return(CallNextHookEx(NULL, nCode, wParam, lParam));
}
// Is F11 being pressed ?
if ((wParam == VK_F11) && ((lParam & (1<<31)) == 0)) {
// Yes, notify our parent app
hwndNotify = FindWindow(NULL, "Security Context Editor");
hwndEdit = GetActiveWindow();
if (hwndNotify != NULL) {
PostMessage(hwndNotify, WM_SECEDITNOTIFY, (WPARAM)hwndEdit, 0);
return(1); // Stop anyone else getting this key press
} else {
DbgPrint("SECEDIT: Keyboard hook could not find app window\n");
}
}
return(CallNextHookEx(NULL, nCode, wParam, lParam));
}