Shared

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Shared

Variable declaration modifier specifying visibility throughout a module

Syntax

Dim Shared ...
ReDim Shared ...
Common Shared ...
Static Shared ...
[Static] Var Shared ...

Description

Shared makes module-level variables visible inside Subs and Functions.
If Shared is not used on a module-level variable's declaration, the variable is only visible to the module-level code in that file (furthermore, only a variable declared with Dim without Shared modifier, and not inside a Namespace block, is stored on the stack).

NOTES (for Shared variables excluding Common variables):

To access from a local scope block to duplicated symbols of Shared variables defined in the global namespace, add one or preferably two dot(s) as prefix: .SomeSymbol or preferably ..SomeSymbol (or only ..SomeSymbol if inside a With..End With block).

Remarks

Differences from QB

• The Shared statement inside scope blocks -- functions, subs, if/thens, and loops -- is not supported. Use Dim|Redim|Common|Static Shared in the main program instead. Or if you're inside a scope block and Redimming a variable or array previously set up with Shared, just do a Redim without Shared; it will work fine and won't ruin anything.

See also

• Common
• Dim
• Erase
• Extern
• LBound
• ReDim
• Preserve
• Static
• UBound
• Var
• Byref (Variables)

Examples

'' Compile with -lang qb or fblite

'$lang: "qb"

Declare Sub MySub

Dim Shared x As Integer

Dim y As Integer

x = 10

y = 5

MySub

Sub MySub

    Print "x is "; x 'this will report 10 as it is shared

    Print "y is "; y 'this will not report 5 because it is not shared

End Sub

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Category: Variable Declarations
Kind: keyword

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Reproduced from the FreeBASIC Wiki Manual under the GNU Free Documentation License 1.3 — with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. Copyright © the FreeBASIC project and wiki contributors. See License.