Extern Element
The Extern element references any external header (.h) files to merge with the .vsct file at compile time. The files to be merged must be on the Include path given to the VSCT compiler or referenced by an Include Element. The files may be other .vsct files or C++ header files.
Definitions in header files must be of the form "#define [Symbol] [Value]" The value may be another symbol if it is previously defined. Definitions may be used in conditional statements of command items. Any symbol not actually used will be discarded.
CommandTable Element
Extern Element
Attributes and Elements
The following sections describe attributes, child elements, and parent elements.
Attributes
Attribute |
Description |
|---|---|
href |
Required. The path to the header file: href="stdidcmd.h" |
Condition |
Optional. See VSCT XML Schema Conditional Attributes. |
language |
Optional. The default language of all <Strings> elements in the command table: language="en-us" |
Child Elements
Element |
Description |
|---|---|
None. |
None. |
Parent Elements
Element |
Description |
|---|---|
Defines all of the elements that represent commands — that is, menu items, menus, toolbars, and combo boxes — that a VSPackage provides to the IDE. |
Example
<?xml version="1.0" encoding="utf-8"?>
<CommandTable xmlns="https://schemas.microsoft.com/VisualStudio/2005-10-
18/CommandTable" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<Extern href="C:\VSCore\vscommon\inc\vsshlids.h"/>
…
<Commands package="guidMyPackage">
</CommandTable>
See Also
Concepts
How VSPackages Add User Interface Elements to the IDE