Справка LibreOffice 24.8
Transfers the control of the program to a subroutine, a function, or a procedure of a Dynamic Link Library (DLL). The keyword, type and number of parameters is dependent on the routine that is being called.
[Call] name [(] [param :=] value, ... [)]
name: Name of the subroutine, the function, or the DLL that you want to call
param: Keyword parameter name to pass to the routine, followed by its value. The name must match the routine declaration. Keywords are optional and can be used in any order.
value: Positional parameter value. The type is dependent on the routine that is being called
При смешивании позиционных и ключевых параметров убедитесь, что позиционные параметры соответствуют обычному порядку объявления.
When a function is used as an expression, enclosing parameters with brackets becomes necessary. Using a Declare statement is compulsory prior to call a DLL.
Sub ExampleCall
Dim value As String
value = "LibreOffice"
Call aRoutine value
aRoutine text := value
End Sub
Sub aRoutine (text as String)
Msgbox text
End Sub