Bring another processes Window to foreground when it has ShowInTaskbar = false

Question

We only want one instance of our app running at any one time. So on start up it looks to see if the app is running and if it is, it calls SetForegroundWindow

Answer 1

Well, code is here. Even if the ShowInTaskBar is false, you should be able to bring it to the front.

    [DllImport("USER32.DLL", CharSet = CharSet.Unicode)]
    public static extern IntPtr FindWindow(String lpClassName, String lpWindowName);

    [DllImport("USER32.DLL")]
    public static extern bool SetForegroundWindow(IntPtr hWnd);

    public static void bringToFront(string title) {
        // Get a handle to the Calculator application.
        IntPtr handle = FindWindow(null, title);

        // Verify that Calculator is a running process.
        if (handle == IntPtr.Zero) {
            return;
        }

        // Make Calculator the foreground application
        SetForegroundWindow(handle);
    }

Note: you should FindWindow using the form's class and not by name as the splash screen forms sometimes do not have titles or even the controlbox. Use Spy++ to dig deeper.

Use FindWindow on splash. I think this is what you want to do - bring the splash screen in front while loading of the main form.