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MessageBox.Show Method (IWin32Window, String, String)

Displays a message box in front of the specified object and with the specified text and caption.

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

public static DialogResult Show (
	IWin32Window owner,
	string text,
	string caption
public static DialogResult Show (
	IWin32Window owner, 
	String text, 
	String caption
public static function Show (
	owner : IWin32Window, 
	text : String, 
	caption : String
) : DialogResult
Not applicable.



An implementation of IWin32Window that will own the modal dialog box.


The text to display in the message box.


The text to display in the title bar of the message box.

Return Value

One of the DialogResult values.

You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner. A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

By default, the message box displays an OK button.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0