ALIAS
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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
- 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