Nice... Some changes I made:

* Now only works in Visual studio (just windows with Microsoft Visual Studio in the title, too lazy to look at the class)
* Escape, ^[ and Enter now all end test naming mode. Escape and ^[ pass the keys through, but Enter does not. May want to add tab?
* Quote (") now adds _ because SpecUnit (and MSpec soon) converts __ to ".

Here's the changed version (feel free to remove from comments if you like):

;=======================================================================================
;BDD Test Naming Mode AHK Script
;
;Description:
; Replaces spaces with underscores while typing, to help with writing BDD test names.
; Toggle on and off with Ctrl + Shift + U.
;=======================================================================================


;==========================
;Initialise
;==========================
#NoEnv ; Recommended for performance and compatibility with future AutoHotkey releases.
#SingleInstance force
SendMode Input ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir% ; Ensures a consistent starting directory.
SetTitleMatchMode 2

enabledIcon := "testnamingmode_16.ico"
disabledIcon := "testnamingmode_disabled_16.ico"
IsInTestNamingMode := false
SetTestNamingMode(false)

;==========================
;Functions
;==========================
SetTestNamingMode(toActive) {
local iconFile := toActive ? enabledIcon : disabledIcon
local state := toActive ? "ON" : "OFF"

IsInTestNamingMode := toActive
Menu, Tray, Icon, %iconFile%,
Menu, Tray, Tip, Test naming mode is %state%

Send {Shift Up}
}

;==========================
;Test Mode toggle
;==========================
#IfWinActive Microsoft Visual Studio
^+u::
SetTestNamingMode(!IsInTestNamingMode)
return

$Escape::
if (IsInTestNamingMode) {
SetTestNamingMode(!IsInTestNamingMode)
}
Send, {Escape}
return

^[::
if (IsInTestNamingMode) {
SetTestNamingMode(!IsInTestNamingMode)
}
Send, ^[
return

$Enter::
if (IsInTestNamingMode) {
SetTestNamingMode(!IsInTestNamingMode)
} else {
Send, {Enter}
}
return

"::
if (IsInTestNamingMode) {
Send, _
} else {
Send, "
}
return


;==========================
;Handle SPACE press
;==========================
$Space::
if (IsInTestNamingMode) {
Send, _
} else {
Send, {Space}
}
#IfWinActive

Brilliant script, I love it! One thing I did change one thing though:

$Enter::
if (IsInTestNamingMode) {
SetTestNamingMode(!IsInTestNamingMode)
} else {
Send, {Enter}
}
return

to this:

$Enter::
if (IsInTestNamingMode) {
SetTestNamingMode(!IsInTestNamingMode)
}
Send, {Enter}
return

I use this most when entering a test method name into a snippet/live template. When I click enter I want it to turn off underscoring, and send the enter command to complete the snippet/template.

Andrew

How are you. No one gossips about other people's secret virtues.
I am from Benin and now study English, give true I wrote the following sentence: "Articles related to suppression of allergic diarrhea in murine ovalbumin induced allergic diarrhea model by pg, a anti allergic effects of pg,"

Waiting for a reply :o, Antionette.