Question: How do I pass arrays or dynarrays to libraries?

Answer: Declare and use a custom type, like the ones shown here:

   type
      arrayAnytype = array[] anyType
      arrayLongInt = array[] longInt
      arrayString = array[] string

      dynarrayAnytype = dynarray[] anyType
      dynarrayLongInt = dynarray[] longInt
      dynarrayString = dynarray[] string
   endType

Once you've declared the custom types, replace the types of your current variable declarations with the names of your new types. For example:

   astrAvailableValues array[] string
   astrSelectedValues array[] string

Becomes:

   astrAvailableValues arrayString
   astrSelectedValues arrayString

Once you've done this, you can declare methods in libraries and forms using the new types. From example, here's the declaration of a method designed to let the user choose a set of values from a standard "dual-list" dialog:

   method showDualList( astrAvailable arrayString,
                        astrSelected arrayString ) Logical

A demonstration form is available in our Download section; this illustrates several ways this technique can be used in your ObjectPAL code.