.NET Framework 4.6 and 4.5
Gets or sets a value indicating whether to display the form as a top-level window.
member TopLevel : bool with get, set
System .Boolean to display the form as a top-level window; otherwise, true . The default is false . true
Exception Condition Exception
A Multiple-document interface (MDI) parent form must be a top-level window.
A top-level form is a window that has no parent form, or whose parent form is the desktop window. Top-level windows are typically used as the main form in an application.
The following code example use the
property to determine if a form is displayed as a modal form. If it is not the Modal and FormBorderStyle properties are changed to make the form non-top-level form with a tool window border. TopLevel
No code example is currently available or this language may not be supported.
Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
.NET Framework Client Profile
Supported in: 4, 3.5 SP1