Revision [16563]

This is an old revision of KeyPgByref made by DkLwikki on 2013-01-28 15:22:12.

 

BYREF (parameters)


Declaration specifier to explicitly pass a parameter by reference

Syntax:
Usage:
Description:
Passes a variable by reference, that is its address, to a subroutine or function. When a variable is passed by reference, the contents of the variable can be changed by the target subroutine or function.

In CompilerOptlang -lang qb and CompilerOptlang -lang fblite dialects, Byref is the default parameter passing convention, unless KeyPgOptionbyval Option ByVal is in effect.
Opposite of KeyPgByval ByVal.

Examples:
Dim MyVar As Integer

Sub ChangeVar(ByRef AVar As Integer)
    AVar = AVar + 1
End Sub

MyVar = 1
Print "MyVar: "; MyVar 'output = 1
ChangeVar MyVar
Print "MyVar: "; MyVar 'output = 2
Sleep
End


Dialect Differences:
Differences from QB:
See also:
Back to Procedures
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