%~1 and %1 Automatically Removing Everything after the first Space - batch-file

Question

So I am creating a batch file to store a selected folder's path into a text file to refer to it later on using another batch script...
I created registry entries to include a right-click context menu for any folder which triggers this specific batch file.
Basically When you right click a folder and click "Send to Script" it is supposed to copy the whole path / location of the right clicked folder.
To do so I am using the following command:
SET TargetDir=%~1
I also tried using %1and I also tried using the following code with delimiters
FOR /f "delims=;" %%a in ("%~1") do (
#echo %%a
)
The problem is that CMD is automatically trimming everything after the first space and since this is a path I am copying, I want to keep all the spaces and the path as is
Ex. If I use the command on a Folder such as "C:/folder/subfolder" the copyng is done correctly But If I use the command on a Folder such as "C:/folder/sub folder" the copying is done incorrectly and will only give me "C:/folder/sub" removing all the rest found after the first space detected.
Registry Entries
[HKEY_CLASSES_ROOT\Directory\shell\send-to-script]
"MUIVerb"="Send To Script"
"SubCommands"="sendscript"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\CommandStore\shell\sendscript]
#="Send To Script"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\CommandStore\shell\sendscript\command]
#="C:\\scripts\\pathtotext.bat %1"
Thanks for your help

Answer 1

You should change your registry key [...\sendscript\command] to
#="C:\\temp\\blob.bat \"%1\""
And in your batch you should use
REM The DisableDelayedExpansion is for preserve "!" in path names
setlocal DisableDelayedExpansion
SET "TargetDir=%~1"
setlocal EnableDelayedExpansion
(
echo target is !TargetDir!
) > C:\scripts\target.log
if "reseverdFolder" == "!TargetDir!" echo This folder is reserved

Answer 2

The batch file is not correct registered. For example look with regedit on value of registry key:
HKEY_CLASSES_ROOT\rtffile\shell\open\command
The value is displayed as:
"%ProgramFiles%\Windows NT\Accessories\WORDPAD.EXE" "%1"
So there are two arguments which are both enclosed in double quotes:
Argument 0 is the application to run with full path, file name and file extension enclosed in double quotes as path contains a space character.
Argument 1 is the name of the RTF file referenced with %1 passed by Windows Explorer with full path, file name and file extension which of course can also contain a space or any of the characters &()[]{}^=;!'+,`~ which require also enclosing entire argument in double quotes as output by cmd.exe on running it in a command prompt window with cmd /? on last help page.
So you need in your *.reg file used to import into Windows registry:
#="\"C:\\scripts\\pathtotext.bat\" \"%1\""
This string value is displayed in registry editor as:
"C:\scripts\pathtotext.bat" "%1"
And then you can use %1 or %~1 in your batch file as explained by help of command CALL output on running in a command prompt window on execution of call /?.

Answer 3

SET "TargetDir=%*"
Since the parameter apparently being supplied is C:\folder\sub folder then %~1 selects only the first supplied parameter of what cmd sees as two parameters.
%* means "the whole tail"
and echoing %* should show you exactly what cmd is seeing.