ALIAS

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

Syntax

DECLARE LIBRARY

SUB pseudoname ALIAS actualname [(parameters)]

END DECLARE

Parameters

• The pseudoname is the name of the SUB or FUNCTION the QB64 program will use.
• The actualname is the same procedure name as it is inside of the library code, it may optionally have a prepended namespace specification (e.g. ALIAS std::malloc).
• 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 wrapper SUB with the Library statement inside of it, just rename it in the declaration.

DECLARE LIBRARY SUB MouseMove ALIAS glutWarpPointer (BYVAL xoffset&, BYVAL yoffset&) END DECLARE DO UNTIL _SCREENEXISTS: LOOP PRINT "Hit a key to move the pointer to top left corner..." SLEEP MouseMove 1, 1

Explanation: When a Library procedure is used to represent another procedure name use ALIAS instead of creating a wrapper SUB. Just place your name for the procedure first with the actual Library name after ALIAS.

See also

• SUB, FUNCTION
• DECLARE LIBRARY, BYVAL
• DECLARE DYNAMIC LIBRARY

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