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28 lines
1.1 KiB
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28 lines
1.1 KiB
Plaintext
'''This page is maintained for historic purposes. The keyword is [[Keywords_currently_not_supported_by_QB64|not supported in QB64]]. Reading values is supported with [[ENVIRON$]].
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----
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The [[ENVIRON]] statement is used in DOS/Windows to temporarily set or change an environmental string value.
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{{PageSyntax}}
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: [[ENVIRON]] {{Parameter|stringExpression$}}
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{{PageDescription}}
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* [[Keywords_currently_not_supported_by_QB64|Not supported in QB64.]]
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* The {{Parameter|stringExpression$}} must include the environmental parameter ID and the setting:
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** Using an '''=''' sign: [[ENVIRON]] "parameterID=setting"
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** Using a space: [[ENVIRON]] "parameterID setting"
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* If the parameter ID did not previously exist in the environmental string table, it is appended to the end of the table.
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* If a parameter ID did exist, it is deleted and the new value is appended to end of the list.
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* DOS discards any changes when your program ends so the program must set them when run.
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* '''WARNING:''' The amount of space in a environmental table is limited and may create memory errors.
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{{PageSeeAlso}}
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* [[ENVIRON$]]
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* [[Windows Environment]]
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{{PageNavigation}}
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