VBS using LIKE to compare strings "Sub or Function not defined" - vbscript

Question

I'm trying to make a script to connect a network printer to a user computer.
The script uses the computer name who needs the printer as a parameter.
Printers names are similar their printserver name, eg. server_USA has printers like printer_USA01, printer_USA02.
But it's throwing the error "Sub or Function not defined" when arrives at the first like... why ?
Set shl = WScript.CreateObject("WScript.Shell")
strName = Wscript.Arguments.Item(0)
'input Printer name
strPrinter = InputBox("Please enter share name of printer to install:", _
"Add network printer")
if strPrinter = "" then
msgbox "Can't be empty."
WScript.quit
elseif strPrinter Like "printer_USA*" then
strServer = server_USA
elseif strPrinter Like "printer_SPAIN*" then
strServer = server_SPAIN
else
'Printer name NOT registered, input printserver manually:
strServer = inputbox("Please enter the name of the printserver","printserver")
if strServer = "" then
msgbox "Can't be empty."
WScript.quit
End if
End if
'ADD
shl.run "RUNDLL32 PRINTUI.DLL,PrintUIEntry /ga /c\\" & strName & " /n\\" & strServer & "\" & strPrinter

Answer 1

there is no Like operator in VBScript. You could use Instr.
if strPrinter = "" then
msgbox "Can't be empty."
WScript.quit
elseif Instr( 1, strPrinter, "printer_USA", vbTextCompare ) > 0 then
strServer = server_USA
The vbTextCompare constant ( value=1) is used to Perform a textual comparison

Answer 2

you can use StrComp to have same result in this way
If StrComp(strPrinter,"printer_USA",vbTextCompare)=0 then
strServer = server_USA
End IF
equal 0 mean zero different between strPrinter and printer_USA with ignore the letter case because we use vbTextCompare .
You can replace vbTextCompare with 1 and you will have same result.
If letter case is important you can use vbBinaryCompare or 0.

Answer 3

A way to do that with select case. This version of instr() is case sensitive, but other versions aren't. instr() returns the position of the found substring, which here is always one.
select case 1
case instr(strPrinter, "") + 1
wscript.echo "empty"
case instr(strPrinter, "printer_USA")
wscript.echo "server_USA"
case instr(strPrinter, "printer_SPAIN")
wscript.echo "server_SPAIN"
case instr(strPrinter, "printer_ITALY"), instr(strPrinter, "printer_RUSSIA")
wscript.echo "other known ones"
case else
wscript.echo "not registered"
end select

Answer 4

I used the following alternative (VBScript Regular Expressions)…
Uses slightly different syntax from LIKE but easiest solution to make a match successfully similar to LIKE operator.
dim regExp
set regExp=CreateObject("VBScript.RegExp")
regExp.IgnoreCase = true
regExp.Global = true
regxp.Pattern = ".*Test Pattern.*" ' example only, basic pattern
if regExp.Test(MyString) then
' match successful
end if