Difference between revisions of "ALIAS"

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* The procedure name does not have to be inside of quotes when using [[DECLARE LIBRARY]].
* The procedure name does not have to be inside of quotes when using [[DECLARE LIBRARY]].
* QB64 does not support optional parameters.
* QB64 does not support optional parameters.
==QBasic/QuickBASIC==
* In Qbasic ALIAS was originally only used in a [[DECLARE (non-BASIC statement)]] library declarations.




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* [[DECLARE LIBRARY]], [[BYVAL]]
* [[DECLARE LIBRARY]], [[BYVAL]]
* [[DECLARE DYNAMIC LIBRARY]]
* [[DECLARE DYNAMIC LIBRARY]]
* [[DECLARE (non-BASIC statement)]]




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Revision as of 01:47, 24 January 2021

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The ALIAS clause in a DECLARE LIBRARY statement block tells the program the name of the procedure used in the external library.


Syntax

SUB pseudoname ALIAS actualname [(parameters)]


Parameters

  • The pseudo name is the name of the SUB or FUNCTION the QB64 program will use.
  • The actual name is the same procedure name as it is inside of the DLL library.
  • QB64 must use all parameters of imported procedures including optional ones.


Description

  • The ALIAS name clause is optional as the original library procedure name can be used.
  • The procedure name does not have to be inside of quotes when using DECLARE LIBRARY.
  • QB64 does not support optional parameters.


Examples

Example: Instead of creating a SUB with the Library statement inside of it, just rename it:

DECLARE LIBRARY SUB MouseMove ALIAS glutWarpPointer (BYVAL xoffset&, BYVAL yoffset&) END DECLARE DO UNTIL _SCREENEXISTS: LOOP PRINT "Hit a key..." SLEEP MouseMove 1, 1

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.


See also



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