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Form.Show Method (IWin32Window)

Updated: October 2010

Shows the form with the specified owner to the user.

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

public void Show(
	IWin32Window owner
)

Parameters

owner
Type: System.Windows.Forms.IWin32Window

Any object that implements IWin32Window and represents the top-level window that will own this form.

ExceptionCondition
InvalidOperationException

The form being shown is already visible.

-or-

The form specified in the owner parameter is the same as the form being shown.

-or-

The form being shown is disabled.

-or-

The form being shown is not a top-level window.

-or-

The form being shown as a dialog box is already a modal form.

-or-

The current process is not running in user interactive mode (for more information, see UserInteractive).

You can use this method to display a non-modal form. When you use this method, the Owner property of the form is set to owner. The non-modal form can use the Owner property to get information about the owning form. Calling this method is identical to setting the Owner property of the non-modal and then calling the Show method.

Showing the form is equivalent to setting the Visible property to true. After the Show method is called, the Visible property returns a value of true until the Hide method is called.

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.

.NET Framework

Supported in: 3.5, 3.0, 2.0

Date

History

Reason

October 2010

Added remarks to explain the difference between this and the Show method.

Corrected exceptions.

Content bug fix.

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