RDC00311 — Early binding opportunity

Severity: Information · Family: RDC (Rubberduck Core analyzers) · Raised by: EarlyBindingOpportunityAnalyzer

CreateObject creates an object of a class that a library the project references declares.

An object created by CreateObject is late-bound: its members are looked up by name when the code runs, so a member that is misspelled, or called with the wrong arguments, is an error only when that line runs. The project references the library the class is of, so the object can be declared as that class and created with New: then its members are checked when the code is compiled, and the editor knows what they are.

CreateObject is the right choice when the project does not reference the library, so that it runs on a machine that has a different version of it, or when the object is created on another machine. Neither case raises this diagnostic.

How it is raised

Situation	Example	Resolution
`CreateObject` is given the identifier of a class that a referenced library declares, as a literal or as a constant.	`Set d = CreateObject("Scripting.Dictionary")`, with a reference to `Scripting`	Declare the object as the class and create it with `New`: `Dim d As Scripting.Dictionary`, then `Set d = New Scripting.Dictionary`.
The same, with an identifier that names no version of a class whose identifier names one.	`CreateObject("DAO.DBEngine")`, with a reference to `DAO`	The same: `Set e = New DAO.DBEngine`.

Table of Contents

RDC00311 — Early binding opportunity

How it is raised

See also