public static bool TryGetThirdPartyForgroundWindow(out IntPtr hwnd)
{
hwnd = IntPtr.Zero;
var foregroundWindow = WinApi.GetForegroundWindow();
var currentThreadId = WinApi.GetCurrentThreadId();
var foregroundThread = WinApi.GetWindowThreadProcessId(foregroundWindow, out var _);
if (currentThreadId == foregroundThread)
{
return(false);
}
else
{
var hwndRoot = WinApi.GetAncestor(foregroundWindow, WinApi.GA_ROOT);
if (hwndRoot != IntPtr.Zero)
{
foregroundWindow = hwndRoot;
}
var className = new StringBuilder(capacity: 256);
WinApi.GetClassName(foregroundWindow, className, className.Capacity - 1);
if (className.ToString().CompareTo("Shell_TrayWnd") == 0)
{
return(false);
}
hwnd = foregroundWindow;
return(true);
}
}
public static IntPtr GetPrevActiveWindow()
{
var foregroundWindow = WinApi.GetAncestor(WinApi.GetForegroundWindow(), WinApi.GA_ROOT);
var hwndPrev = IntPtr.Zero;
var hwndFound = IntPtr.Zero;
bool enumWindowsProc(IntPtr hwnd, IntPtr lparam)
{
if (WinApi.IsWindowVisible(hwnd))
{
if (hwndPrev == foregroundWindow)
{
hwndFound = hwnd;
return(false);
}
hwndPrev = hwnd;
}
return(true);
}
WinApi.EnumDesktopWindows(IntPtr.Zero, enumWindowsProc, IntPtr.Zero);
return(hwndFound);
}