'Declaration
 
Public Overloads Shared Function Show( _
   ByVal ownerWindowHandle As IntPtr, _
   ByVal messageText As String, _
   ByVal caption As String, _
   ByVal button As MessageBoxButton, _
   ByVal icon As MessageBoxImage, _
   ByVal defaultResult As MessageBoxResult, _
   ByVal messageBoxStyle As Style _
) As MessageBoxResult

'Usage
 
Dim ownerWindowHandle As IntPtr
Dim messageText As String
Dim caption As String
Dim button As MessageBoxButton
Dim icon As MessageBoxImage
Dim defaultResult As MessageBoxResult
Dim messageBoxStyle As Style
Dim value As MessageBoxResult
 
value = MessageBox.Show(ownerWindowHandle, messageText, caption, button, icon, defaultResult, messageBoxStyle)

public static MessageBoxResult Show( 
   IntPtr ownerWindowHandle,
   string messageText,
   string caption,
   MessageBoxButton button,
   MessageBoxImage icon,
   MessageBoxResult defaultResult,
   Style messageBoxStyle
)

Parameters

ownerWindowHandle

An IntPtr that specifies the handle of the window that owns this MessageBox.

messageText

A string that specifies the text to display.

caption

A string that specifies the title bar caption to display.

button

A System.Windows.MessageBoxButton value that specifies which button or buttons to display.

icon

A System.Windows.MessageBoxImage value that specifies the icon to display.

defaultResult

A System.Windows.MessageBoxResult value that specifies the default result of the MessageBox.

messageBoxStyle

A Style representing the style that will be applied to the MessageBox.

Return Value

Target Platforms: Windows 11, Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

MessageBox Class
MessageBox Members
Overload List