Check if a UTF16 character is the high character in a surrogate pair.
Source position: unicodedata.pas line 493
| function UnicodeIsHighSurrogate( | 
| const AValue: UnicodeChar | 
| ):Boolean; | 
| AValue | 
 | UTF16 character to check. | 
True if AValue forms the high character of a surrogate pair.
UnicodeIsHighSurrogate checks whether AValue is a valid high character of a surrogate pair, and returns True if this is the case. It does this by checking whether the values are within the bounds for high characters in surrogate pairs.
| 
 | Convert UCS4 to UNicodeChar. | |
| 
 | Encode unicode UTF16 surrogate pair to UCS4 character. | |
| 
 | Check if a UTF16 character is the high character in a surrogate pair. | |
| 
 | Check if a UTF16 character is the low character in a surrogate pair. | |
| 
 | Check if a pair of UTF16 encoded characters is a valid surrogate pair. |