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When Windows later transitioned to Unicode, there was a desire to extend this to allow entry of any Unicode code point. Some applications like [[Microsoft Office 2010|Word 2010]] or [[PSPad]] 4.5.6 interpret alt codes larger than 255 directly as a decimal Unicode code point, but other software interprets such numbers [[Modular arithmetic|modulus]] 256, or ignores any digits after the third. Although CP1252 is almost identical to the start of Unicode, this prevents entry of the code points from U+0080 to U+009F, and (more problematic) other ANSI code pages prevent entry of some very common Latin accented letters. In addition much Unicode documentation show the code points in [[base 16|hex]], not decimal. So a third method was developed to unambiguously enter Unicode.
To enable the third method, a user must set or create the [[Windows Registry|registry]] key <code>HKCU\Control Panel\Input Method\EnableHexNumpad</code> with type REG_SZ to value 1 and reboot (logging out and logging back in is sufficient). The following method can then be used to enter Unicode codepoints:
* Hold {{keypress|Alt}} and type the {{keypress|+}} key on the numeric keypad, then type the hexadecimal number (using the numeric keypad for digits {{keypress|0}}–{{keypress|9}} and the normal keys for {{keypress|a}}–{{keypress|f}}), then release {{keypress|Alt}}. For example, {{key press|Alt}}+{{key press|+}}{{key press|1}}{{key press|1}}{{key press|b}} will produce "<tt>ě</tt>" (e with caron).
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