Making icons in file manager exactly 32px with labels below

Thanks, I disabled Classic Theme, used the slider and enable Classic Theme.

in other way.
first you will need to enable small icons on.
then you will have to search "IconSize" on regedit.
it's gonna tell you wrong slot key. but ignore it and press f3.
and then you will located to the #1 slot key. but go to bottom.
for mine it says: {5C4F28B5-F869-4E84-8E60-F11DB97C5CC7}.
and you can change the icon size to 20.
once you're done that. restart explorer.

Here is a slightly updated version of the script:

#NoTrayIcon
#NoEnv
Gui +LastFound
hWnd := WinExist()
SetControlDelay, -1
SetBatchLines -1

DllCall( "RegisterShellHookWindow", UInt,hWnd )
MsgNum := DllCall( "RegisterWindowMessage", Str,"SHELLHOOK" )
OnMessage( MsgNum, "ShellMessage" )
Return

ShellMessage(wParam,lParam) {
  If (wParam = 1  or wParam = 6) { ;  HSHELL_WINDOWCREATED := 1 {
WinGetClass, WinClass, ahk_id %lParam%
if (WinClass = "CabinetWClass") {
SendMessage, 0x108F,,,SysListView321, ahk_id %lParam%
If (ErrorLevel=0x2) {
SendMessage, 0x108E, 0,,SysListView321, ahk_id %lParam%
}
}
}
}
This version is pretty similar to the original, except it eliminates the need to add and remove the LVS_SMALLICONS style and instead cuts to the chase by basically just telling the ListView control to use large icons. The result is not only cleaner but also much faster.

Can the script be modified in such a way that it send this message only if the icons are exactly 32px?

Sorry for the delay, but this is a bit more of an overhaul than the last one. This was originally part of a larger project of mine that never really saw the light of day. Due to the fact that it's more complex that the original script, I'm distributing it as a package with some extra features.
Download

Here is a quick rundown of what's included:

ShellIconSizeMgr
This is the main script that resides in memory. Comes in 32-bit and 64-bit variants (or you can simply run the AHK script in the src folder if you really want to).


ShellIconSizeMgrCfg
This small application can be used to change your icon size settings. It allows you to either force small/large icons or specify your own minimum size for large icons.



Note: The "Always use large icons" and "Always use small icons" options are faster than the "Specify a minimum size for large icons" option since they don't need to retrieve the current icon size. Use these options if you just want one or the other without any fuss.


SetExplorerIconView
This is a utility that will let you specify a folder's view mode and icon size. It can be added to Classic Shell’s Explorer toolbar or Explorer’s context menu with some registry edits.

Usage:
SetExplorerIconView.exe [-mode] [size]

-mode The view mode you wish to use. Accepts the following arguments:
Icons Sets the view mode to either small or large icons based on your settings
SmallIcons Sets the view to Small Icons with labels on the right
LargeIcons Sets the view to Large Icons with labels on the bottom
Details Sets the view to Details
Tiles Sets the view to Extended Tiles
List Sets the view to List

size The icon size. Must be an integer with a minimum value of 16 and a maximum value of 256. Can be used with any view mode.
Example: This command would be used to set the view mode to 32x32px large icons:
SetExplorerIconView.exe -LargeIcons 32