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#Undefine Preprocessor Directive
#Undefine Preprocessor Directive
preprocessor directives WDK GDL , keywords
keywords WDK GDL
reserved keywords WDK
Undefine directive WDK GDL
04/20/2017

#Undefine Preprocessor Directive

#Undefine: symbol

The #Undefine directive removes the symbol value from the preprocessor symbol dictionary. If the symbol has been defined multiple times, only the most recent definition of symbol is removed.

The symbol value is optional. If you omit this value, the most recently defined symbol is removed. However, the delimiting colon (:) is still required.