current font的用法和样例：
例句
- The default settings for this section correspond to the current font settings of the control.
此部分的默认设置对应于控件的当前字体设置。 - NLastChar Specifies the last character in the range of characters from the current font for which character widths are returned.
从已返回字体宽度的当前字体的字符集中指定末字符。
