How to send € to the CMD-window Topic is solved

[Albireo]

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ControlSend("{Text}" Chr(0x20AC),, "ahk_pid " cmdPID)

　Maybe...? Chr(0x20AC)=="€"

I don't understand!

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ControlSend(Chr(0x20AC)=="€",, "ahk_pid " cmdPID)

I got the sesult = 0 (zero)

[Seven0528]

　...What I'm trying to say is that Chr(0x20AC) is exactly the same as the string "€".
The Chr function returns a string using its parameter, which represents a Unicode number.
Every character has its own Unicode number, and the Unicode number for € is 0x20AC in hexadecimal.
In most cases (though not always in a programmatic context), U+20AC is the standard notation.

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#Requires AutoHotkey v2.0
#SingleInstance Force
Msgbox Chr(0x20AC)=="€" ;  true

[Seven0528]

　equal
== is a comparison operator that returns 1 if two values are equal, and 0 if they are not.
1 represents true, and 0 represents false.
In many cases, you may have seen = used as a comparison operator.
== and = are similar, but the former always distinguishes between uppercase and lowercase characters,
while the latter is case-insensitive.
(Personally, I prefer the former to avoid confusion with other programming languages.)

[mikeyww]

I would argue that, as a case-insensitive comparison operator, = in AHK v2 is closest to == in the languages that use it. Thus, I think that using == in AHK to try to replicate == in other languages creates more confusion rather than less confusion. In many cases (situations), it also generates a bug in the script, because most string comparisons are intended to be case-insensitive.

[Seven0528]

　This is my mistake. Sorry.
In other languages, = is usually used as an assignment operator. (In AHK, :=)
So I tend to use it simply to reduce typing errors, personally...
(Of course, I've mentioned the differences, but it seems there was some potential for misunderstanding.)

[Albireo]

Thanks to all of you.

This is a compilation of five (different) ways to send a slightly unusual character (€) to a DOS window .:

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#Requires AutoHotkey v2

Run 'cmd',,, &cmdPID
WinWait('ahk_pid' . cmdPID)

; Send Keys
Send "{U+20AC}"	; Sends € to CMD window
Send Chr(0x20AC)      ; Sends € to CMD window

; ControlSend Keys , Control, WinTitle, WinText, ExcludeTitle, ExcludeText
ControlSend("{U+20AC}",, "ahk_exe cmd.exe")	; Sends € to CMD window
ControlSend("{U+20AC}",, "ahk_pid " cmdPID)	; Sends € to CMD window
ControlSend("{Text}" Chr(0x20AC),, "ahk_pid " cmdPID)	; Sends € to CMD window

MsgBox  A_AhkVersion "`n" A_PtrSize " (4 = 32-bit, 8 = 64-bit) `n`nTecken (5st) .: " chr(0x20AC)

; WinClose WinTitle, WinText, SecondsToWait, ExcludeTitle, ExcludeText
; WinClose "Calculator"
WinClose "ahk_pid " cmdPID

; WinWaitClose WinTitle, WinText, Timeout, ExcludeTitle, ExcludeText
WinWaitClose "ahk_pid " cmdPID

; MsgBox Text, Title, Options
MsgBox "Ready!", "Row .: " A_LineNumber " - " A_ScriptName