Substring help in batch file

Question

How do I extract everything between incno and the space ie12345678 in the example batch below and put it into a incno variable?

@echo off  
Set mystring=test incno12345678 wo5555 locFred Street   
Echo "my string=%mystring%"   
Echo incno   
Echo wo    
Echo loc  

The incno can be 8 to 11 digits long but will always be between incno and a space in the string

I am now having trouble assigning the %%d variable to the mystring variable now it is in a for loop. Can anyone help me with this? See Below.

@echo off
SETLOCAL enableDelayedExpansion
color 0B
For /d %%d in ("C:\Users\%Username%\LocalData\*") do (
Echo "Folder = %%d"
Set mystring=%%d
echo "MyString = %mystring%"
pause
REM delete until (including) "incno":
set mystring=%mystring:*incno=%
echo %mystring%
REM delete starting with (including) " ":
set mystring=%mystring: =&rem %
echo "Incident Number = %mystring%"
pause
)

Answer 1

you can do it with substring replacement in two steps:

Set mystring=test incno12345678 wo5555 locFred Street
echo %mystring%
REM delete until (including) "incno":
set mystring=%mystring:*incno=%
echo %mystring%
REM delete starting with (including) " ":
set mystring=%mystring: =&rem %
echo %mystring%

Answer 2

set "mystring=test incno12345678 wo5555 locFred Street"
for /f %%V in ("%mystring:* incno=%") do set "incno=%%V"

Delayed expansion can be used if there is a chance that mystring might contain poison characters plus quotes:

setlocal enableDelayedExpansion
set mystring=test incno12345678 wo5555 loc"4th & Main"
for /f %%V in ("!mystring:* incno=!") do set "incno=%%V"

If the resultant value might contain ! (not an issue in this case) then delayed expansion must be toggled

setlocal disableDelayedExpansion
set mystring=test varABC!XYZ "&)^|<>"
setlocal enableDelayedExpansion
for /f %%V in ("!mystring:* var=!") do (
  endlocal
  set "var=%%V"
)