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<a name="1102122"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">6.1 Exception levels</font>
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<a name="1102123"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">All exception handlers are identified by an integer called the exception level. Exception levels 0 to <em>HighestException</em> (255) are available for user-defined exceptions, while system exceptions have negative levels, as defined in <a href="except2.htm#1102185"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Table⌨️ 快捷键说明
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