NoStartupFormException Class

Note: This class is new in the .NET Framework version 2.0.

This exception is thrown by the Visual Basic Application Model when the MainForm property has not been set.

Namespace: Microsoft.VisualBasic.ApplicationServices
Assembly: Microsoft.VisualBasic (in microsoft.visualbasic.dll)

public class NoStartupFormException : Exception
/** @attribute SerializableAttribute() */ 
public class NoStartupFormException extends Exception
public class NoStartupFormException extends Exception

The Visual Basic Application Model requires that the application set the MainForm property before running the OnRun method. If the property is not set, the Visual Basic Application Model raises this exception. For more information, see Extending the Visual Basic Application Model.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0