public WinEventHook(WinEventDelegate handler, WinEvent eventMin, WinEvent eventMax, string xllPath)
{
// Note : could we use another handle than one of an xll ?
// Thus we could avoid carrying the xll path.
// The events are still hooked after the xll has been unloaded.
var xllModuleHandle = Win32Helper.GetModuleHandle(xllPath);
var excelProcessId = Win32Helper.GetExcelProcessId();
_procDelegate = handler;
_hWinEventHook = SetWinEventHook(eventMin, eventMax, xllModuleHandle, handler, excelProcessId, 0, SetWinEventHookFlags.WINEVENT_INCONTEXT);
}
// Must run on the main Excel thread (or another thread where Windows messages are pumped)
void InstallWinEventHook(object _)
{
var excelProcessId = Win32Helper.GetExcelProcessId();
_hWinEventHook = SetWinEventHook(_eventMin, _eventMax, IntPtr.Zero, _handleWinEventDelegate, excelProcessId, 0, SetWinEventHookFlags.WINEVENT_OUTOFCONTEXT);
if (_hWinEventHook == IntPtr.Zero)
{
Logger.WinEvents.Error("SetWinEventHook failed");
// Is SetLastError used? - SetWinEventHook documentation does not indicate so
throw new Win32Exception("SetWinEventHook failed");
}
Logger.WinEvents.Info($"SetWinEventHook success on thread {Thread.CurrentThread.ManagedThreadId}");
}
readonly WinEventDelegate _handleWinEventDelegate; // Ensures delegate that we pass to SetWinEventHook is not GC'd
public WinEventHook(WinEvent eventMin, WinEvent eventMax, SynchronizationContext syncContextAuto, IntPtr hWndFilterOrZero)
{
if (syncContextAuto == null)
{
throw new ArgumentNullException(nameof(syncContextAuto));
}
_syncContextAuto = syncContextAuto;
_hWndFilterOrZero = hWndFilterOrZero;
var xllModuleHandle = Win32Helper.GetXllModuleHandle();
var excelProcessId = Win32Helper.GetExcelProcessId();
_handleWinEventDelegate = HandleWinEvent;
_hWinEventHook = SetWinEventHook(eventMin, eventMax, xllModuleHandle, _handleWinEventDelegate, excelProcessId, 0, SetWinEventHookFlags.WINEVENT_INCONTEXT);
if (_hWinEventHook == IntPtr.Zero)
{
Logger.WinEvents.Error("SetWinEventHook failed");
// Is SetLastError used? - SetWinEventHook documentation does not indicate so
throw new Win32Exception("SetWinEventHook failed");
}
Logger.WinEvents.Info($"SetWinEventHook success on thread {Thread.CurrentThread.ManagedThreadId}");
}
