I am trying to use SET CPCOMPILE and COMPILE command to preserve characters used in my .PRG files in code page which I want, and in this case it's code page 1252 (default Windows).
I have tried to do:

SET CPCOMPILE TO 1252
COMPILE my.PRG AS 1252
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but when I change code page in Windows XP (language in Regional and Language options) the characters in .PRG that I have compiled in 1252 are also changed to characters from code page to which I have changed.
SET CPCOMPILE and COMPILE command didn't preserve the characters from code page 1252.

How can I preserve them in code page I want, without affecting them changing code page in Windows?