'''This page is maintained for historic purposes. The usage of the DECLARE keyword explained below isn't supported by QB64. QB64 ignores any occurrences of DECLARE SUB/FUNCTION when older code is compiled. For the modern usage of the DECLARE keyword, see [[DECLARE LIBRARY]].'''

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Declares calling sequences for external procedures written in other languages.



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: [[DECLARE]] {[[SUB]]|[[FUNCTION]]} name [ [[CDECL]] ] [ [[ALIAS]] "aliasname"] [([parameterlist, ...])]


* [[CDECL]] indicates that the procedure uses the C language argument order.
* [[ALIAS]] indicates the procedure name used in the object or library file.
* The syntax for the parameterlist is as follows: [{ [[BYVAL]] | [[SEG]] }] variable  [AS type [,[{ [[BYVAL]] | [[SEG]] }] variable2 [ [[AS]] type]]...
* '''QB64 ignores DECLARE statements, so define the parameter [[TYPE]] values in the SUB!'''



''See also:'' 

* [[CALL]], [[CALLS]], [[SETMEM]]
* [[DECLARE LIBRARY]] (QB64 Only)



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