Unattended Project Cannot be visible at runtime

A project marked for Unattended Execution cannot have any visible user interface elements. This message has the following cause and solution:

• The Unattended flag was manually set in the .VBP file and the project was compiled or executed in the design environment.

  To solve this problem, remove all forms from the project or change the Startup Object in the Project Properties dialog box to (none) or Sub Main.