How to Quit Installation from VbScript Custom Action?

If you are using VBScript Custom Action and want to Quit installation, here is a little trick:

Simply return 3 from your method/function and let your Custom Action "check" the return code. Whenever your Custom Action would get 3 from method/function, it would immediately Quit. Here is some sample code:

In WIX, declare your Custom Action like this: Note the value for “Return” attribute:

WIX: Custom Action Declaration

1.  <CustomAction Id="CheckAutoCAD"
2.    BinaryKey="MyCustomActions.vbs"
3.    VBScriptCall="GetInstalledAutoCAD"
4.    Execute="immediate"
5.    Return="check"
6. />

Here is the VbScript function which would return 3 if it fails. And as Custom Action would ‘check’ for return code, it will read the return code:

VBScript Function

1. Public Function GetInstalledAutoCAD()
2.     Const IDABORT = 3'If function returned this, MSI installation would be terminated immediately
3.      'statements
4.      'statements
5.      'statements
6.      if Not AutoCADFound then
7.         Msgbox "Setup cannot find any required AutoCAD installation." & VbCrlf & _
8.             "Please install AutoCAD before installing this product",
9.             16,
10.             "Missing Prerequiste"
11.     
12.         GetInstalledAutoCAD=IDABORT 'this would return 3 and may cause msi installer to quite immediately.
13.      else
14.         GetInstalledAutoCAD=0
15.      end if
16. End Function

BTW, I never tried same with any JScript, but I think, if same would be returned by JScript, installer would quit as well.