I cant understand concept of code page.

For me, code page is set of 256 characters (quoted from msdn).

If i want to output character XX, function lookup its position in the table and draw corresponding glyph. This is by using ansi functions (xxxA). Wheni use unicode function, always get same glyph for character.


Qs:
- what is the purpose of code page in console input buffer?
- does unicode functions (xxxW) use code pages?

b1528932,

Console input code pade tells you how to interpret KEY_EVENT_RECORD.uChar.AsciiChar field from ReadConsoleInputA() for values outside ASCII range. There are multi-byte character sets too: Japanese Shift-JIS, Chinese Big5 and GBK, for example.

xxxW functions use UTF-16 LE encoding (code page 1200) which uses surrogate pairs to represent some Unicode code points. It can be seen as they use one codepage.

Ok, so how actually goes this translation?

I want to output ascii 0x90.
xxA function convert it into utf16 character using code page, then write proper data into CHAR_INFO.

when i use xxW function, there is no translation at all, data just go as i input?

same for input, just lower layer receive KEY_EVENT_RECORD.uChar.UnicodeChar depending on code page?