'Declaration
 
Public Overloads Sub ShowMessageBox( _
   ByVal messageText As String, _
   ByVal caption As String, _
   ByVal button As MessageBoxButton, _
   ByVal icon As MessageBoxImage, _
   ByVal defaultResult As MessageBoxResult _
) 

'Usage
 
Dim instance As MessageBox
Dim messageText As String
Dim caption As String
Dim button As MessageBoxButton
Dim icon As MessageBoxImage
Dim defaultResult As MessageBoxResult
 
instance.ShowMessageBox(messageText, caption, button, icon, defaultResult)

public void ShowMessageBox( 
   string messageText,
   string caption,
   MessageBoxButton button,
   MessageBoxImage icon,
   MessageBoxResult defaultResult
)

Parameters

messageText

caption

button

icon

defaultResult

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