EUDCCodeRange key in the following Registry path contains entries that defines EUDC code ranges per code page.
HKEY_LOCAL_MACHINE\
System\CurrentControlSet\Control\NLS\CodePage\EUDCCodeRange
CodePage REG_SZ FromTo{,FromTo}
Specifies an EUDC code range or ranges.
The value of CodePage is either 932 (Japan), 936 (Simplified Chinese), 949 (Unified Hangeul), or 950 (Traditional Chinese).
The FromTo must be a pair of 4 digit hexadecimal values separated by a '-'. To specify more than 2 code ranges, ',' is a delimiter of each of FromTo. Any EUDC related functions don't work without this entry.
For example:
HKEY_LOCAL_MACHINE\
System\CurrentControlSet\Control\NLS\CodePage\EUDCCodeRange
932=F040-F9FC
950=FA40-FEFE,8E40-A0FE,8140-8DFE,C6A1-C8FE
EUDC key in the following Registry path contains entries that define parameters for EUDC.
HKEY_CURRENT_USER\EUDC\CodePage
The EUDC key contains CodePage subkey. The values of CodePage subkey is either 932 (Japan), 936 (Simplified Chinese), 949 (Unified Hangeul), or 950 (Traditional Chinese). The CodePage subkey may contain the following entries.
SystemDefaultEUDCFont REG_SZ TrueTypeEUDCFontFileName
Specifies the system default EUDC font. The TrueTypeEUDCFontFileName is the filename of a TrueType EUDC font. The system default EUDC font doesn't work without this entry.
TrueTypeFontTypeface REG_SZ TrueTypeEUDCFontFileName
Specifies an DBCS TrueType font typeface and its typeface-specific TrueType EUDC font file name. The TrueTypeFontTypeface is a DBCS TrueType font typeface and TrueTypeEUDCFontFileName is a typeface-specific TrueType EUDC font file name.
For example:
HKEY_CURRENT_USER\EUDC\932 SystemDefaultEUDCFont=EUDC.TTF MS Mincho=MINEUDC.TTF MS Gothic=GOTEUDC.TTF