How do you show progress in the Taskbar with Winform C# 4.5

Question

EDIT: I don't want it to update, change or go away. I ONLY want the taskbar to be at 40% to start the program, stay that way till it closes.

I spent a lot of hours and tried many examples...but no luck.

To keep it simple, how do you show 40% done in Error color?

This code runs but does nothing on the screen, no errors, just runs right by:

public TaskbarItemInfo taskBar = new TaskbarItemInfo();

then in a method:

taskBar.ProgressState = System.Windows.Shell.TaskbarItemProgressState.Error;
taskBar.ProgressValue = 0.40;

If you breakpoint on the next line and look, it has set the values, they just don't do anything on the screen...

Answer 1

Here's a short example that you should be able to use to tailor to your needs:

    System.Windows.Window w = new System.Windows.Window();
    w.TaskbarItemInfo = new System.Windows.Shell.TaskbarItemInfo() { ProgressState = System.Windows.Shell.TaskbarItemProgressState.Normal };
    w.Loaded += delegate {
        Action<Object> callUpdateProgress = (o) => {
            w.TaskbarItemInfo.ProgressValue = (double) o;
        };

        Thread t = new Thread(() => {
            for (int i = 1; i <= 10; i++) {
                w.Dispatcher.BeginInvoke(callUpdateProgress, 1.0 * i / 10);
                Thread.Sleep(1000);
            }
        });
        t.Start();
    };

    System.Windows.Application app = new System.Windows.Application();
    app.Run(w);

To make the above work you need to have using System.Threading; at top and also add references of: PresentationCore, PresentationFramework, SystemXaml, WindowsBase.