March 2003
Intermediate to advanced
512 pages
14h 30m
English
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Name
GetRef Function
Syntax
GetRef(procname)procnameUse: Required
Data Type: String
Name of a sub or function
Return Value
A Long containing a reference to
procname.
Description
Returns a reference to a sub or function. This reference can be used for such purposes as binding to events or defining callback functions.
Rules at a Glance
GetRef can be used whenever a function or procedure reference is expected.
When using GetRef to define event handlers for events, the
Setkeyword is required. For example, the code required to bind the Window.OnLoad event to a procedure named ShowGreetingDialog is:Set Window.OnLoad = GetRef("ShowGreetingDialog")
Example
<HTML>
<HEAD>
<TITLE>The VBScript GetRef Function</TITLE>
</HEAD>
<BODY>
<SCRIPT LANGUAGE="VBSCRIPT">
Set popWin = Window.CreatePopup( )
Set Window.Onload = GetRef("ShowPopup")
Sub ShowPopup( )
Set popBody = popWin.Document.Body
popBody.Style.BackgroundColor = "lightblue"
popBody.Style.Border = "solid black"
popBody.innerHTML = "Click outside <B>popup</B> to close."
popWin.Show 100, 100, 220, 30, Document.body
End Sub
</SCRIPT>
</BODY>
</HTML>Programming Tips and Gotchas
A common use of GetRef is to bind to DHTML events in Internet Explorer. You can use GetRef to bind to any of the events in the DHTML object model.
GetRef can be used to pass the address of a procedure to a routine that expects the address of a callback function as an argument.
VBA/VBScript Differences
The GetRef function is not supported by VBA. However, similar functionality is provided ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.