#elseifndef

Preprocessor conditional directive

Syntax
   #ifdef A
      ' Conditionally included statements if A is defined
   #elseifndef B
      ' Conditionally included statements if both A and B are not defined
   #else
      ' Conditionally included statements if A is not defined and B is 
      defined
   #endif

Description
   #elseifndef can be added to an #if block to provide an additional 
   condition.

   #elseifndef symbol is equivalent to #elseif Not defined(symbol)

Example
   #ifdef A
      Print "A is defined"
   #elseifndef B
      Print "both A and B are not defined"
   #else
      Print "A is not defined and B is defined"
   #endif

Version
   * Since fbc 1.20.0

Differences from QB
   * New to Freebasic

See also
   * #define
   * #macro
   * #if
   * #else 
   * #elseif 
   * #elseifdef 
   * #endif 
   * #ifdef
   * #ifndef
   * #undef
   * defined

