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Form.WindowState Property

Gets or sets a value that indicates whether form is minimized, maximized, or normal.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public FormWindowState WindowState { get; set; }

Property Value

Type: System.Windows.Forms.FormWindowState
A FormWindowState that represents whether form is minimized, maximized, or normal. The default is FormWindowState.Normal.

ExceptionCondition
InvalidEnumArgumentException

The value specified is outside the range of valid values.

Before a form is displayed, the WindowState property is always set to FormWindowState.Normal, regardless of its initial setting. This is reflected in the Height, Left, Top, and Width property settings. If a form is hidden after it has been shown, these properties reflect the previous state until the form is shown again, regardless of any changes made to the WindowState property.

The following code example demonstrates how to create a top-most form. The example creates two forms, one that is maximized and one which will be displayed as a top-most form. The first form, named bottomForm, is displayed maximized, using the WindowState property, to better demonstrate the abilities of the top-most form. The second form, named topMostForm, sets the TopMost property to true to display the form as a top-most form. When this code is run, clicking on the maximized form will not cause the topmost form to be displayed below the maximized form. The example requires that the method defined in the example is called from another form.

private void CreateMyTopMostForm()
{
   // Create lower form to display.
   Form bottomForm = new Form();
   // Display the lower form Maximized to demonstrate effect of TopMost property.
   bottomForm.WindowState = FormWindowState.Maximized;
   // Display the bottom form.
   bottomForm.Show();
   // Create the top most form.
   Form topMostForm = new Form();
   // Set the size of the form larger than the default size.
   topMostForm.Size = new Size(300,300);
   // Set the position of the top most form to center of screen.
   topMostForm.StartPosition = FormStartPosition.CenterScreen;
   // Display the form as top most form.
   topMostForm.TopMost = true;
   topMostForm.Show();
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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