BUG: Overlay and radmessagebox do not work together

Hmm, that doesn't make much sense then as I created a new VB Winforms project using the Telerik template for that.  I found the problem in the app I'm working on, and then was able to reproduce it in the sample app.

However... after trying my sample app today (I've since rebooted), its working.  However, it isn't working totally as expected as now the popup for the radmessagebox pops up, but it is appearing under my app window as well as under the VS Studio app.

Thank you for the additional details.

I have double-checked the project and you are right that the RadMessageBox appears under VS app but not under your application. Generally speaking, the application is still not shown in the Load event of the form. When the overlay screen is shown it stills the focus and deactivates the form. When the overlay is closed the form is still not activated. That is why the message box appears under VS. To make this work you can force activating the form by calling the Activate() method of the Form.

private void Form2_Load(object sender, EventArgs e)
{
    RadOverlayManager.Show(this);
    for (var x = 0; x <= 1999999999; x++)
    {
    }
    RadOverlayManager.Close();
    this.Activate();
    RadMessageBox.Show( "You will never see this.", "Nope", MessageBoxButtons.OK, RadMessageIcon.Info);
}

As a side note, the purpose of the overlay is to be shown on top of the control and notify the user of the long-running operation is performing. As in your case, you want to show the user that the application is loading, a better approach here is to use RadSplashScreen. You can also customize its content per your needs. Check the Customize Splash Content help article for more information.

Thanks for the response, I think understand what you mean.

One question, I have multiple forms that may be opened by the user.  They can take a few seconds to load due to retrieving data, so I wanted to use the overlay on them (not just the startup form, any form).  I get what you mean about the splash screen and that'll work for the app load.  But I can't get it to work when opening another form.  Here's an example of what I'm doing:

    Private Sub frmRemoteLogViewer_Shown(sender As Object, e As EventArgs) Handles Me.Shown
        RadOverlayManager.Show(Me)
        GetFileList()
        RadOverlayManager.Close()
        Me.Activate()
    End Sub