Bring Another Processes Window to Foreground When It Has Showintaskbar = False

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

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.

Bring another application to front

[System.Runtime.InteropServices.DllImport("User32.dll")]
private static extern bool SetForegroundWindow(IntPtr handle);

private IntPtr handle;

private void button4_Click(object sender, EventArgs e)
{
    Process[] processName = Process.GetProcessesByName("ProgramName");
    if (processName.Length == 0)
    {
        //Start application here
        Process.Start("C:\\bin\\ProgramName.exe");
    }
    else
    {
        //Set foreground window
        handle = processName[0].MainWindowHandle;
        SetForegroundWindow(handle);
    }
}

If you also wish to show the window even if it is minimized, use:

if (IsIconic(handle))
    ShowWindow(handle, SW_RESTORE);

WinForms ShowInTaskbar=False vs Tabbing between applications

After further research, I found that my problem was being caused due to having the form border as FixedToolWindow and ShowInTaskbar=False on the dialog windows. I changed the form border to FixedDialog, and set MaximizeButton=False, MinimizeButton=False. That fixed the issue.

Is that possible to remove a little windows that showing a form name when ShowInTaskbar = false?

If you "Minimize" the window, it has to go somewhere - either the Taskbar or the desktop. You can set the MinimizeBox property to False and that will prevent it from minimizing to the desktop or at all.

I think what you really want to do is hide the form. And if you still want the user to have the ability to "Minimize" the form (or at least think they do) you can subscribe to the form's Resize event and check the WindowState. If the WindowState is Minimized, set it back to Normal and call the form's Hide method.

private void LoadedDataForm_Resize (object sender, EventArgs e)
{
    if (this.WindowState == FormWindowState.Minimized) {
        this.WindowState = FormWindowState.Normal;
        this.Hide ();
    }
}

C# console application bring process to foreground

An option to achieve your task is to send shift + tab to the window to set it in front of everything (i tried in another application different ways, but only this worked for me):

// is used to set window in front
[DllImport("User32.dll", SetLastError = true)]
static extern void SwitchToThisWindow(IntPtr hWnd, bool fAltTab);

public void startT32app()
{
    IntPtr handle;
    try
    {
        Console.WriteLine("T32 launching");
        string path = @"C:\T32\bin\windows64\t32mppc.exe";
        string args = @"C:\T32\config.t32";
        ProcessStartInfo procInfo = new ProcessStartInfo(path, args);
        procInfo.CreateNoWindow = false;
        procInfo.UseShellExecute = true;
        procInfo.WindowStyle = ProcessWindowStyle.Normal;

        Process procRun = Process.Start(procInfo);
        handle = procRun.MainWindowHandle;
        SwitchToThisWindow(handle, true);
    }
    catch
    {
        Console.WriteLine("Failed to launch T32");
    }
}

LoginForm hides or closes automatically when the ShowInTaskBar property is false

Set ShowInTaskBar and ShowIcon in constructor of your dialog:

public partial class LoginForm : Form
{
    public LoginForm()
    {
        InitializeComponent();
        this.ShowInTaskbar = false;
        this.ShowIcon = false;
    }
}

And then show it in Shown method of the main form:

public partial class MainForm : Form
{
    public MainForm()
    {
        InitializeComponent();
    }
    protected override void OnShown(EventArgs e)
    {
        base.OnShown(e);
        new LoginForm().ShowDialog();
    }
}

Bring process to foreground in silverlight

I think you are looking for Bring window to front as discussed here Bring another processes Window to foreground when it has ShowInTaskbar = false

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