public WindowMonitor()
{
_foregroundWindowChanged = (hook, type, hwnd, idObject, child, thread, time) =>
{
// ignore any event not pertaining directly to the window
if (idObject != User32.NativeMethods.OBJID_WINDOW)
{
return;
}
// Ignore if this is a bogus hwnd (shouldn't happen)
if (hwnd == IntPtr.Zero)
{
return;
}
var(processId, windowText, windowClass) = ProcessWindowInformation(hwnd);
//Couldn't find the processId of the window
if (processId == 0)
{
return;
}
Task.Factory.StartNew(() =>
{
try
{
var process = Process.GetProcessById((int)processId);
var processName = process.MainModule?.FileName ?? "N/A";
ForegroundChanged?.Invoke(this, new Event(processId, processName, windowText, windowClass, hwnd));
}
catch (Exception e)
{
Log.Warning(e, "Couldn't get info about foreground process");
}
});
};
ComThread.Invoke(() =>
{
User32.NativeMethods.SetWinEventHook(User32.NativeMethods.EVENT_SYSTEM_MINIMIZEEND,
User32.NativeMethods.EVENT_SYSTEM_MINIMIZEEND,
IntPtr.Zero, _foregroundWindowChanged,
0,
0,
User32.NativeMethods.WINEVENT_OUTOFCONTEXT);
User32.NativeMethods.SetWinEventHook(User32.NativeMethods.EVENT_SYSTEM_FOREGROUND,
User32.NativeMethods.EVENT_SYSTEM_FOREGROUND,
IntPtr.Zero, _foregroundWindowChanged,
0,
0,
User32.NativeMethods.WINEVENT_OUTOFCONTEXT);
});
}
public ForegroundProcess()
{
_winEventDelegate = (hook, type, hwnd, idObject, child, thread, time) =>
{
var windowProcessId = ComThread.Invoke(() =>
{
try
{
User32.NativeMethods.GetWindowThreadProcessId(hwnd, out var processId);
return(processId);
}
catch
{
return((uint)0);
}
});
if (windowProcessId == 0)
{
return;
}
Task.Factory.StartNew(() =>
{
var process = Process.GetProcessById((int)windowProcessId);
var processName = process.MainModule?.FileName ?? "N/A";
Changed?.Invoke(this, new Event(windowProcessId, processName));
});
};
ComThread.Invoke(() =>
{
User32.NativeMethods.SetWinEventHook(User32.NativeMethods.EVENT_SYSTEM_MINIMIZEEND,
User32.NativeMethods.EVENT_SYSTEM_MINIMIZEEND,
IntPtr.Zero, _winEventDelegate,
0,
0,
User32.NativeMethods.WINEVENT_OUTOFCONTEXT);
User32.NativeMethods.SetWinEventHook(User32.NativeMethods.EVENT_SYSTEM_FOREGROUND,
User32.NativeMethods.EVENT_SYSTEM_FOREGROUND,
IntPtr.Zero, _winEventDelegate,
0,
0,
User32.NativeMethods.WINEVENT_OUTOFCONTEXT);
});
}
public WinEventHookHelper(User32.NativeMethods.SystemEvents evt)
{
this.evt = evt;
evtProc = new User32.NativeMethods.WinEventDelegate(EventProc);
}
