Function

Summary

The predicate for whether a registry key can be opened.

Signature

registry-key-exists-p subkey &key root access => existsp

Arguments

subkey

A string specifying the name of the key.

root

A keyword or handle.

access

An integer or keyword.

Values

existsp

A boolean.

Description

The function registry-key-exists-p checks whether the registry key named subkey can be opened under the parent key root with the supplied access permissions.

subkey and root are interpreted as described for create-registry-key. The default value of root is :user .

If access is :read , then it opens the key with KEY_READ permissions. If access is :write , then it opens the key with KEY_WRITE permissions. If access is an integer, then the value access specifies the desired Win32 access rights. If access is omitted and root is :user , then registry-key-exists-p uses KEY_ALL_ACCESS . Otherwise it uses KEY_READ .

registry-key-exists-p closes the key before returning, but the return value is t if the key could actually be opened and nil otherwise.

See also

create-registry-key