How to search between multiple lines in Notepad++ ??

Prahlad-Makwana4145

Hello, Everyone

I am trying to perform a search between multiple lines and also delete selected text.
Example show below :-

I want to start a search from this word “Description This:” To “<h3>” select all text and delete it.
When i search in 1st line i have used .*?.*

Description This: 
                Hello everyone.
                How are you ?
                Where are you ?
                I am going to School please come with me.
                Thank you for everything.
                <h3>
                Good to see you.

Thank you in advance.

guy038

Hello, Prahlad-Makwana4145 and All,

Hi, Happy New Year 2020 !

Regarding your problem, two solutions are possible :

SEARCH (?-i)^Description(?s).*?<h3>\R

OR

SEARCH (?-i)^Description(.|\R)*?<h3>\R
REPLACE Leave EMPTY
Tick the Wrap around option and select the Regular expression search mode
Use either the Replace All or the Replace button

Notes :

First, the in-line modifier (?-i) forces the search to care about casing of letters
After the part ^Description looks for the word Description, with that exact case, at beginning of lines
Then the part (?s), an in-line modifier too, means that any subsequent regex . symbol will match any single character, including EOL ones
Now, the part .*? represents the shortest range of any character till…
The part <h3>\R which matches an <h3> tag with its ine-break ( \R)
As replacement is empty, any text matched is just deleted
In the second search form, we replace the part (?s). with (.|\R) which stands, in the same way, for a single standard or an EOL character

Best Regards,

guy038

Prahlad-Makwana4145

Hello, Happy New Year 2020 ! @guy038 and All,

Thank you for Replay your both solution are work successfully for me.