Preprocessor conditional directive
Syntax
#ifndef symbol
' Conditionally included statements
Endif
Description
Conditionally includes statements at compile time.
Statements within the
#ifndef...#endif block are included if
symbol is not defined and excluded (ignored) if
symbol is defined.
#ifndef symbol is equivalent to
#if Not defined(symbol)
Example
#ifndef __MYFILE_BI__
#define __MYFILE_BI__
' Declarations
#endif
Differences from QB
See also