net9.0-windows10.0.22621 
namespace Microsoft.VisualBasic.ApplicationServices
{
    public class WindowsFormsApplicationBase : ConsoleApplicationBase
    {
        [EditorBrowsable(EditorBrowsableState.Never)]
        [Experimental("WFO5001", UrlFormat = "https://aka.ms/winforms-experimental/{0}")]
        protected SystemColorMode ColorMode { get; set; }
    }
}
Design Reviews
.NET 9.0
Information specific to net9.0
Platforms This API is only available when you target a specific platform:
Windows 7.08.010.0.1776310.0.1836210.0.1904110.0.2034810.0.2200010.0.22621
Information specific to net9.0-windows10.0.22621
Assembly

Microsoft.VisualBasic.Forms , Version=9.0.0.0, PublicKeyToken=b03f5f7f11d50a3a

Referencing

Your project needs to set <UseWindowsForms>True</UseWindowsForms>.

Preview WFO5001: This API is marked as experimental.(more details)
Platform Restrictions

The property getter is only supported on the following platforms:

  • Windows >= 6.1

The property setter is only supported on the following platforms:

  • Windows >= 6.1
  • Built-in API
  • Package-provided API