How can I concatenate a hard-coded string and a variable to create a parameter?

[ma_roberge]

I have written a routine using wildcards that replaces all instances of two spaces or more by one space, but the French version of Word 2007 requires a comma for specifying a minimum number of characters in a find string, e.g., {2,}, whereas Word 2013 requires a semicolon, i.e., {2;}. I have written the following code to set the punctuation required for each of the two versions of Word I could test. It is followed by two calls to the find and replace routine, of which the second is functional but works only in Word 2013. I am thus trying to concatenate the space (between square brackets), the curly brackets, and my variable, but do not know how to achieve what I need. Furthermore, do Word 2010 and 2016 also use the semicolon? Thanks for any help in advance.

Dim strWordVersion As String
Select Case Val(Application.Version)
    Case 15 'Version 2013
        strWordVersion = ";"
    Case 14 'Version 2010
    Case 12 'Version 2007
        strWordVersion = ","
    Case 11 'Version 2003
End Select
Call FindReplaceAll("[ ] & {2 & strWordVersion & }", " ", "Message") 'Incorrect find string
'Call FindReplaceAll("[ ]{2;}", " ", "Message") 'Functional statement