Arguments

key  (string) the registry key to write the value for
name  (string, optional)  if omitted or NIL, the data is written to the (Standard) key, otherwise the data string is written to the specified name value
data  (string, optional)  if the data is omitted or NIL, an empty string is written

Return

(string) the data written to the registry key / name

Example

(vl-registry-read "HKEY_CURRENT_USER\\Software\\Bricsys\\BricsCAD" "CURVER" "V20x64")
"V20x64"

Remarks

to access the (Standard) value, the name can be omitted, or specified as empty string ""

since V22

(vl-registry-write) also supports QWord, Binary and MultiString data;

QWord : accepts an integer value, up to 64 bit range, like 1203635403395952110 or -5903635403395952110

Binary : accepts a list using the format
(3 0 16 35 69 0 16 35 70 0 16 35 71 0 16 35 72)
the first entry 3 specifies that the subsequent list entries are of type integer (in range 0...255)

MultiString : accepts a list using the format
(7 "hello" "we have multiple lines within this string" "%USERPROFILE%" "%APPDATA%" "should be" "an array of" "eight single" "strings")
the first entry 7 specifies that the subsequent list entries are of type string (can contain empty strings)

see (vl-registry-read) function