Registry.KeyExists |
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Syntax function Registry.KeyExists(Registry: pointer; Key: string): boolean
Description Checks to see if the given registry key with path Key exists for the given Registry object.
Returns TRUE if the key exists, FALSE otherwise.
See also
Example execute udsblock returns( out_vc varchar(1000), out_int integer, out_float double precision, out_time timestamp) as begin reg = Registry.Open(__HKEY_CURRENT_USER, 0); try /* returns -1 (true) */ out_int = Registry.OpenKey(reg, '\Software\Upscene\DScript\Test', __TRUE);
/* this key doesn't exist, so this returns 0 (false) */ out_int = Registry.KeyExists(reg, 'Newkey');
/* write string value, value name now exists */ Registry.WriteString(reg, 'NewValue', 'string'); out_int = Registry.ValueExists(reg, 'NewValue'); /* returns -1 (true) */ Registry.DeleteValue(reg, 'NewValue'); out_int = Registry.ValueExists(reg, 'NewValue'); /* returns 0 (false) again */
/* write and read several values */ Registry.WriteInteger(reg, 'NameInt', 12); out_int = Registry.ReadInteger(reg, 'NameInt');
Registry.WriteFloat(reg, 'NameFloat', 13.13); out_float = Registry.ReadFloat(reg, 'NameFloat');
Registry.WriteBool(reg, 'NameBool', __FALSE); out_int = Registry.ReadBool(reg, 'NameBool');
Registry.WriteTime(reg, 'NameTime', TIME'12:13'); out_time = Registry.ReadTime(reg, 'NameTime');
Registry.WriteDate(reg, 'NameDate', DATE'2024-12-23'); out_time = Registry.ReadDate(reg, 'NameDate');
Registry.WriteDateTime(reg, 'NameDateTime', TIMESTAMP'2024-12-23 12:13'); out_time = Registry.ReadDateTime(reg, 'NameDateTime');
Registry.CloseKey(reg); /* delete the test key */ out_int = Registry.DeleteKey(reg, '\Software\Upscene\DScript\Test'); /* test key existence, returns 0 (false) */ out_int = Registry.KeyExists(reg, '\Software\Upscene\DScript\Test'); finally Registry.Free(reg); end end; |