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37 lines
1.5 KiB
Plaintext
37 lines
1.5 KiB
Plaintext
The '''ALIAS''' clause in a [[DECLARE LIBRARY]] statement block tells the program the name of the procedure used in the external library.
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{{PageSyntax}}
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::: SUB ''pseudoname'' '''ALIAS''' ''actualname'' [(''parameters'')]
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{{Parameters}}
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* The ''pseudo name'' is the name of the [[SUB]] or [[FUNCTION]] the QB64 program will use.
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* The ''actual name'' is the same procedure name as it is inside of the DLL library.
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* QB64 must use all parameters of imported procedures including optional ones.
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''Description:''
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* The ALIAS name clause is optional as the original library procedure name can be used.
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* The procedure name does not have to be inside of quotes when using [[DECLARE LIBRARY]].
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* QB64 does not support creating optional parameters at this time.
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* In Qbasic ALIAS was originally only used in a [[DECLARE (non-BASIC statement)]] library declarations.
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''Example:'' Instead of creating a SUB with the Library statement inside of it, just rename it:
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{{CodeStart}} '' ''
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{{Cl|DECLARE LIBRARY}}
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{{Cl|SUB}} MouseMove {{Cl|ALIAS}} SDL_WarpMouse ({{Cl|BYVAL}} xoffset&, {{Cl|BYVAL}} yoffset&)
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{{Cl|DECLARE LIBRARY|END DECLARE}}
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{{CodeEnd}}
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:''Explanation:'' When a Library procedure is used to represent another procedure name use ALIAS instead. Saves creating a SUB! Just place your name for the procedure first with the actual Library name after ALIAS.
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{{PageSeeAlso}}
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* [[SUB]], [[FUNCTION]]
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* [[DECLARE LIBRARY]], [[BYVAL]]
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* [[DECLARE DYNAMIC LIBRARY]]
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* [[DECLARE (non-BASIC statement)]]
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{{PageNavigation}} |