The scope of a variable defines how and where you can use a variable. You define the scope in the variable declaration.
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Variable: VAR
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Variable: VAR_INPUT
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Variable: VAR_OUTPUT
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Variable: VAR_IN_OUT
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Variable: VAR_GLOBAL
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Variable: VAR_TEMP
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Variable: VAR_STAT
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Variable: VAR_EXTERNAL
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Variable: VAR_INST
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Variable: VAR_CONFIG
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Variable: CONSTANT
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Variable: VAR_GENERIC CONSTANT
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Variable: PERSISTENT
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Variable: RETAIN
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Pointer: SUPER
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Pointer:
THIS -
Data Type: Implicit Enumeration