static LONG hook_init()
{
ULONG ACLEntries[1] = {0};
NTSTATUS NtStatus;
#include "hooklist.h"
#undef HOOK_DEFINE
FORCE(LhSetGlobalExclusiveACL(ACLEntries, 0));
return NOERROR;
ERROR_ABORT:
TRACE(_T("hook_init error: %#x\n"), NtStatus);
return 1;
}
extern "C" int main(int argc, wchar_t* argv[])
{
TRACED_HOOK_HANDLE hHook = new HOOK_TRACE_INFO();
NTSTATUS NtStatus;
ULONG ACLEntries[1] = {0};
UNICODE_STRING* NameBuffer = NULL;
ORIG_CreateFontIndirectW = CreateFontIndirectW;
FORCE(LhInstallHook(
ORIG_CreateFontIndirectW,
IMPL_CreateFontIndirectW,
(PVOID)0,
hHook));
FORCE(LhSetInclusiveACL(ACLEntries, 1, hHook));
CreateFontIndirectW(0);
CreateFontW(10, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, L"system");
LOGFONTA lf = {};
CreateFontIndirectA(&lf);
CreateFontA(12, 0, 0, 0, 400, 0, 0, 0, 2, 0, 0, 0, 0, "MARLETT");
#if 0
ORIG_GetTextExtentPoint32A = GetTextExtentPoint32A;
FORCE(LhInstallHook(
ORIG_GetTextExtentPoint32A,
IMPL_GetTextExtentPoint32A,
(PVOID)0,
hHook));
HDC hdc = GetDC(NULL);
SIZE size;
FORCE(LhSetInclusiveACL(ACLEntries, 1, hHook));
GetTextExtentPoint32W(hdc, L"abc", 3, &size);
GetTextExtentPointW(hdc, L"abc", 3, &size);
GetTextExtentPoint32A(hdc, "abc", 3, &size);
GetTextExtentPointA(hdc, "abc", 3, &size);
#endif
#if 0
ORIG_MessageBeepHook = MessageBeep;
/*
The following shows how to install and remove local hooks...
*/
FORCE(LhInstallHook(
ORIG_MessageBeepHook,
MessageBeepHook,
(PVOID)0,
hHook));
printf(".\n");
// won't invoke the hook handler because hooks are inactive after installation
MessageBeep(123);
getch();
BOOL flags = 1;
FORCE(LhIsThreadIntercepted(hHook, 0, &flags));
printf("Intercepted %d\n", flags);
// activate the hook for the current thread
FORCE(LhSetInclusiveACL(ACLEntries, 1, hHook));
FORCE(LhIsThreadIntercepted(hHook, 0, &flags));
printf("Intercepted %d\n", flags);
printf(".\n");
// will be redirected into the handler...
MessageBeep(123);
getch();
FORCE(LhSetGlobalExclusiveACL(ACLEntries, 1));
printf(".\n");
// will be redirected into the handler...
MessageBeep(123);
getch();
FORCE(LhSetGlobalInclusiveACL(ACLEntries, 1));
printf(".\n");
// will be redirected into the handler...
MessageBeep(123);
getch();
printf(".\n");
// won't invoke the hook handler because hooks are inactive after installation
ORIG_MessageBeepHook(123);
getch();
#endif
// this will also invalidate "hHook", because it is a traced handle...
LhUninstallAllHooks();
// this will do nothing because the hook is already removed...
LhUninstallHook(hHook);
printf(".\n");
// will be redirected into the handler...
MessageBeep(123);
getch();
// now we can safely release the traced handle
delete hHook;
hHook = NULL;
// even if the hook is removed, we need to wait for memory release
LhWaitForPendingRemovals();
return 0;
ERROR_ABORT:
if(hHook != NULL)
delete hHook;
if(NameBuffer != NULL)
free(NameBuffer );
printf("\n[Error(0x%p)]: \"%S\" (code: %d {0x%p})\n", (PVOID)NtStatus, RtlGetLastErrorString(), RtlGetLastError(), (PVOID)RtlGetLastError());
_getch();
return NtStatus;
}
