Everything about Alt Code totally explained
In
PCs running the
Microsoft Windows or
DOS operating systems, additional characters to those available by the current
keyboard layout may be typed using the
Alt key in conjunction with the keyboard's numeric pad. This technique is generally called an
Alt code.
The mapping between numbers and characters are based on the selected code page. On
Microsoft Windows, adding a leading zero to the number uses the
ANSI code page rather than the OEM code page. On systems in the United States, the ANSI code page is
windows-1252 and the OEM code page is
code page 437. On most systems in Western Europe, the OEM code page is
code page 850. For a complete list, see
Code page.
If
num lock is disabled, attempting an alt code may cause unexpected results in some applications (for example, as alt+4 is taken as alt-(left arrow) causing a web browser to go back one page). Also, num lock may be required for an alt code to work at all on some systems.
Unicode usage
Some applications (for example
WordPad) extend this method to allow any
Unicode character, for example ALT+0256 for Ā. Also, on Windows 2000 or later, the registry key
HKCUControl PanelInput MethodEnableHexNumpad can be enabled to allow
Alt-+-(HEX) for unicode entry.
Further Information
Get more info on 'Alt Code'.
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