'宣言 Public Overridable Sub ShouldShowOverflowIndicator( _ ByVal ownerContext As Object, _ ByRef showOverflowIndicator As Boolean, _ ByRef showToolTip As Boolean, _ ByRef indicatorImage As Image _ )
public virtual void ShouldShowOverflowIndicator( object ownerContext, out bool showOverflowIndicator, out bool showToolTip, out Image indicatorImage )