.NET Framework Class Library
Application..::.OpenForms Property

Gets a collection of open forms owned by the application.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)
Syntax
Visual Basic (Declaration) 
Public Shared ReadOnly Property OpenForms As FormCollection
Visual Basic (Usage) 
Dim value As FormCollection

value = Application.OpenForms
C# 
public static FormCollection OpenForms { get; }
Visual C++ 
public:
static property FormCollection^ OpenForms {
    FormCollection^ get ();
}
JScript 
public static function get OpenForms () : FormCollection

Property Value

Type: System.Windows.Forms..::.FormCollection
A FormCollection containing all the currently open forms owned by this application.
Remarks

The OpenForms property represents a read-only collection of forms owned by the application. This collection can be searched by index position or by the Name of the Form.
.NET Framework Security
Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0
See Also

Reference

Application Class
Application Members
System.Windows.Forms Namespace
Exit
FormCollection
Tags :


Community Content

Rudedog2
Possible Bug Associated with Application.OpenForms
There is a nasty bug in the implementation of Application.OpenForms, you should avoid relying on it. This code shows the bug at work:

public partial class Form1 : Form {
public Form1() {
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e) {
this.ShowInTaskbar = !this.ShowInTaskbar;
MessageBox.Show("Number of open forms: " + Application.OpenForms.Count);
}
}
This info is courtesy of

Hans Passant.

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