Convert UCS4 to UNicodeChar.
Source position: unicodedata.pas line 487
procedure FromUCS4(  | 
const AValue: UCS4Char;  | 
out AHighS: UnicodeChar;  | 
out ALowS: UnicodeChar  | 
);  | 
AValue  | 
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UCS4 encoded unicode character.  | 
AHighS  | 
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High character of surrogate pair.  | 
ALowS  | 
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Low character of surrogate pair.  | 
FromUCS4 converts the UCS4 encoded unicode character AValue to a set of unicode (surrogate pair) characters encoded in UTF16: AHighS, ALowS.
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Encode unicode UTF16 surrogate pair to UCS4 character.  | 
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Check if a UTF16 character is the high character in a surrogate pair.  | 
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Check if a UTF16 character is the low character in a surrogate pair.  | 
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Check if a pair of UTF16 encoded characters is a valid surrogate pair.  |