Get pointer

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4D v19.8

Get pointer


Get pointer ( varName ) -> Function result

Parameter	Type	Description
varName	String	Name of a process or interprocess variable
Function result	Pointer	Pointer to process or interprocess variable

Description

The Get pointer command returns a pointer to the process or interprocess variable whose name you pass in varName.

To get a pointer to a field, use Field. To get a pointer to a table, use Table.

Note: You can pass expressions such as, for example, ArrName+"{3}", as well as 2D array elements (ArrName+"{3}{5}") to Get pointer.
However, you cannot pass variable elements (ArrName+"{myVar}").

Example 1

In a form, you build a 5 x 10 grid of enterable variables named v1, v2... v50. To initialize all of these variables, you write:

  ` ...

 For($vlVar;1;50)

    $vpVar:=Get pointer("v"+String($vlVar))

    $vpVar->:=""

 End for

Example 2

Using pointers to elements of two-dimensional arrays:

 $pt:=Get pointer("a{1}{2}")

  //$pt=->a{1}{2}

 $pt2:=Get pointer("atCities"+"{2}{6}")

  //$pt2=->atCities{2}{6}