Form.TopLevel Property
.NET Framework (current version)
Gets or sets a value indicating whether to display the form as a top-level window.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Property Value
Type: System.Booleantrue to display the form as a top-level window; otherwise, false. The default is 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 Modal property to determine if a form is displayed as a modal form. If it is not the FormBorderStyle and TopLevel properties are changed to make the form non-top-level form with a tool window border.
Private Sub ShowMyNonModalForm() Dim myForm As New Form() myForm.Text = "My Form" myForm.SetBounds(10, 10, 200, 200) myForm.Show() ' Determine if the form is modal. If myForm.Modal = False Then ' Change borderstyle and make it not a top level window. myForm.FormBorderStyle = FormBorderStyle.FixedToolWindow myForm.TopLevel = False End If End Sub
.NET Framework
Available since 1.1
Available since 1.1
Show: