Unable to run an a created application on Windows 10 Enterprise

Question

I have been working on a C# application recently that would be used on a Windows 10 Enterprise system. The issue is that when a button is pressed on the application, it should open the On-screen Keyboard but when I do press it, nothing seems to happen. I have tested this application on windows 7 devices and a windows 10 Pro device and it works as intended on both. To make for easier testing, I wrote a small application that would simply send the start process command for the OSK:
Process.Start(new ProcessStartInfo { UseShellExecute = true, FileName = "osk" });

The results were the same as the application except for the command prompt window opens for a second and then disappears when used on Win10 Enterprise . I can run the command in the command prompt and it works on all systems so it isn't that OSK doesn't work in the testing environment. In addition, I also tried the tests above with joy.cpl instead of OSK and the results were the same. Any advice would be appreciated.

Answer 1

It seems that osk.exe can only run on x64.

When I use AnyCPU, an exception occurs:

When I switch the PlatformTarget to x64, everything works fine.

I am using Windows 10 Enterprise, version 2004.

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Answer 2

Not sure if it is the Wow64 redirection problem, because you should get an exception...

You can check if it is that with :

            bool bWow64 = false;
            IsWow64Process(Process.GetCurrentProcess().Handle, out bWow64);
            if (bWow64)
            {
                IntPtr OldValue = IntPtr.Zero;
                bool bRet = Wow64DisableWow64FsRedirection(out OldValue);
            }
            Process.Start(new ProcessStartInfo { UseShellExecute = true, FileName = "osk" });

Declarations :

    [DllImport("Kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
    private static extern bool IsWow64Process(IntPtr hProcess, out bool Wow64Process);

    [DllImport("Kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
    private static extern bool Wow64DisableWow64FsRedirection(out IntPtr OldValue);