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Registry Table

The Registry table holds the registry information that the application needs to set in the system registry.

The Registry table has the following columns.

ColumnTypeKeyNullable
Registry Identifier YN
Root Integer NN
Key RegPath NN
Name Formatted NY
Value Formatted NY
Component_ Identifier NN

 

Columns

Registry

Primary key used to identify a registry record.

Root

The predefined root key for the registry value. Enter a value of -1 in this field to make the root key dependent on the type of installation. Enter one of the other values in the following table to force the registry value to be written under a particular root key.

ConstantHexadecimalDecimalRoot key
(none)- 0x001-1If this is a per-user installation, the registry value is written under HKEY_CURRENT_USER.

If this is a per-machine installation, the registry value is written under HKEY_LOCAL_MACHINE. Note that a per-machine installation is specified by setting the ALLUSERS property to 1.

msidbRegistryRootClassesRoot0x0000HKEY_CLASSES_ROOT

The installer writes or removes the value from the HKCU\Software\Classes hive during installation in the per-user installation context.

The installer writes or removes the value from the HKLM\Software\Classes hive during per-machine installations.

msidbRegistryRootCurrentUser0x0011HKEY_CURRENT_USER
msidbRegistryRootLocalMachine0x0022HKEY_LOCAL_MACHINE
msidbRegistryRootUsers0x0033HKEY_USERS

 

Note that it is recommended that registry entries written to the HKCU hive reference a component having the RegistryKeyPath bit set in the Attributes column of the Component table. This ensures that the installer writes the necessary registry entries when there are multiple users on the same computer.

Key

The localizable key for the registry value.

Name

This column contains the registry value name (localizable). If this is Null, then the data entered into the Value column are written to the default registry key.

If the Value column is Null, then the strings shown in the following table in the Name column have special significance.

StringMeaning
+The key is to be created, if absent, when the component is installed.
-The key is to be deleted, if present, with all of its values and subkeys, when the component is uninstalled.
*The key is to be created, if absent, when the component is installed. Additionally, the key is to be deleted, if present, with all of its values and subkeys, when the component is uninstalled.

 

Note that the RemoveRegistry table must be used if an installed registry key is to be deleted, with its values and subkeys, when the component is installed.

Value

This column is the localizable registry value. The field is Formatted. If the value is attached to one of the following prefixes (i.e. #%value) then the value is interpreted as described in the table. Note that each prefix begins with a number sign (#). If the value begins with two or more consecutive number signs (#), the first # is ignored and value is interpreted and stored as a string.

PrefixMeaning
#xThe value is interpreted and stored as a hexadecimal value (REG_BINARY).
#%The value is interpreted and stored as an expandable string (REG_EXPAND_SZ).
#The value is interpreted and stored as an integer (REG_DWORD).

 

  • If the value contains the sequence tilde [~], then the value is interpreted as a Null-delimited list of strings (REG_MULTI_SZ). For example, to specify a list containing the three strings a, b and c, use "a[~]b[~]c".
  • The sequence [~] within the value separates the individual strings and is interpreted and stored as a Null character.
  • If a [~] precedes the string list, the strings are to be appended to any existing registry value strings. If an appending string already occurs in the registry value, the original occurrence of the string is removed.
  • If a [~] follows the end of the string list, the strings are to be prepended to any existing registry value strings. If a prepending string already occurs in the registry value, the original occurrence of the string is removed.
  • If a [~] is at both the beginning and the end or at neither the beginning nor the end of the string list, the strings are to replace any existing registry value strings.
  • Otherwise, the value is interpreted and stored as a string (REG_SZ).
Component_

External key into the first column of the Component table referencing the component that controls the installation of the registry value.

Remarks

The WriteRegistryValues and RemoveRegistryValues actions in sequence tables process the information in this table. For information about using sequence tables, see Using a Sequence Table.

The registry information is written out to the system registry when the corresponding component has been selected to be installed locally or run from source.

Note that the installer removes a registry key after removing the last value or subkey under the key. To prevent an empty registry key from being removed when uninstalling, write a dummy value under the key you need to keep and enter + in the Name column. If * is in the Name column, the key is deleted, with all of its values and subkeys, when the component is removed.

A custom action can be used to add rows to the Registry table during an installation, uninstallation, or repair transaction. These rows do not persist in the Registry table and the information is only available during the current transaction. The custom action must therefore be run in every installation, uninstallation, or repair transaction that requires the information in these additional rows. The custom action must come before the RemoveRegistryValues and WriteRegistryValues actions in the action sequence.

For information on how to secure a registry key see the MsiLockPermissionsEx Table and LockPermissions Table.

Validation

ICE02
ICE03
ICE06
ICE32
ICE38
ICE43
ICE46
ICE49
ICE53
ICE55
ICE57
ICE70
ICE80

 

 

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