Set HIDEFILTERFILENAME regex: with space in text

Hi Opus Gurus
I want to filter text with a space in it.
Consider the sample text below.
There is one space between the 2 words:

CCP Photos

If I go Folder > Format Options > Hide Filters > Filenames
And I enter the text above the lister hides all files which contains the above string in the filename.
That is how it supposed to work I think.
Now lets try the same thing using the set internal command.
I get the results below

Set Command Syntax Result
Set HIDEFILTERFILENAME regex:CCP CCP
Set HIDEFILTERFILENAME regex:CCP Photos (Blank)
Set HIDEFILTERFILENAME regex:'CCP Photos' (Blank)
Set HIDEFILTERFILENAME regex:CCP Photos "CCP Photos

Is there any syntax where I can specify a string with spaces?
10000000 thank yous......

Set HIDEFILTERFILENAME "regex:CCP Photos"