'Declaration Public MustOverride Function Undo( _ ByVal sender As Object _ ) As Boolean
'Declaration
Public MustOverride Function Undo( _ ByVal sender As Object _ ) As Boolean
'使用法 Dim instance As UndoAction Dim sender As Object Dim value As Boolean value = instance.Undo(sender)
'使用法
Dim instance As UndoAction Dim sender As Object Dim value As Boolean value = instance.Undo(sender)
public abstract bool Undo( object sender )
UndoAction クラス UndoAction メンバ
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