如何为笔刷参数指定默认值 [英] how to assign default value for brush parameter

问题描述

私人子DrawNote(ByVal hIndex为Short，
可选的ByVal oBrush As Brush = Brushes.Black)

可选的ByVal oBrush As Brush = Brushes.Black''不写

tnx

Private Sub DrawNote(ByVal hIndex As Short,
Optional ByVal oBrush As Brush = Brushes.Black)

Optional ByVal oBrush As Brush = Brushes.Black ''does not word

tnx

推荐答案

查看此内容 http://www .vbforums.com/showthread.php?t = 647265 [ ^ ]

而此 http://www.xtremevbtalk.com/showthread.php?t=318853 [ ^ ]

Brushes.Black是只读属性，并且需要一个常量表达式

Check this out http://www.vbforums.com/showthread.php?t=647265[^]

and this http://www.xtremevbtalk.com/showthread.php?t=318853[^]

Brushes.Black is a read only property and a constant expression is required

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