How to get key name with AutoHotkey

Question

I want to switch input languages by using Henkan and KanaHira keys, these are implemented Japanese keyboard.

    vk1Csc079::
      PostMessage, 0x50, 0, 0x41E041E,, A ; 0x50 is WM_INPUTLANGCHANGEREQUEST
    Return

    vkF2sc070::
      PostMessage, 0x50, 0, 0x4110411,, A ; 0x50 is WM_INPUTLANGCHANGEREQUEST
    Return

vk1Csc079 is code for Henkan and vkF2sc070 is for KanaHira. With this code I could change keyboard Japanese to Thai, but I couldn't change Thai to Japanese backwards.

I noticed that because in Thai there are another key mapping so the KanaHira doesn't exist anymore after switching.

So I want to know what key code should I write for the function to enable it in Thai keyboard. Does anyone know about it?

Key Histories

Window: C:\Users\ironsand\Desktop\thai_keyboard.ahk - AutoHotkey v1.1.23.05
Keybd hook: no
Mouse hook: no
Enabled Timers: 0 of 0 ()
Interrupted threads: 0
Paused threads: 0 of 0 (0 layers)
Modifiers (GetKeyState() now) = 
Modifiers (Hook's Logical) = 
Modifiers (Hook's Physical) = 
Prefix key is down: no

NOTE: Only the script's own keyboard events are shown
(not the user's), because the keyboard hook isn't installed.

NOTE: To disable the key history shown below, add the line "#KeyHistory 0" anywhere in the script.  The same method can be used to change the size of the history buffer.  For example: #KeyHistory 100  (Default is 40, Max is 500)

The oldest are listed first.  VK=Virtual Key, SC=Scan Code, Elapsed=Seconds since the previous event.  Types: h=Hook Hotkey, s=Suppressed (blocked), i=Ignored because it was generated by an AHK script, a=Artificial, #=Disabled via #IfWinActive/Exist, U=Unicode character (SendInput).

VK  SC  Type    Up/Dn   Elapsed Key     Window
-------------------------------------------------------------------------------------------------------------
Press [F5] to refresh.

Answer 1

There are certain functions that will force a keyboard hook to be installed and others that will not. Your script doesn't have any that mandate the keyboard hook, therefore it is not globally running/available

Note the top of your log file... keyboard hook = no....

Window: C:\Users\ironsand\Desktop\thai_keyboard.ahk - AutoHotkey v1.1.23.05
Keybd hook: no
Mouse hook: no
Enabled Timers: 0 of 0 ()

And the second note...

NOTE: Only the script's own keyboard events are shown
(not the user's), because the keyboard hook isn't installed.

In order to force a keyboard hook and see keystrokes for all key presses, you should be able to add the #InstallKeybdHook or #UseHook On directive at the top of your script. After doing this, you should be able to go to key history and see that the keyboard hook is enabled.

Once the keyboard hook is enabled and you have the key history window up, press the key you need to get the key history for. It will not appear in the window however until you press F5, as noted by @harrymc.

After writing this, I saw that there were more comments and that you have already figured all of this out. I am going to post any way for whoever else may happen along.