Q35536: How to Write and Use C Extensions

Article: Q35536
Product(s): See article
Version(s): 1.00   | 1.00
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | appnote | mspl13_basic
Last Modified: 6-JAN-1989

The following information is taken from an application note called
"Microsoft Editor Questions and Answers." The application note also is
available from Microsoft Product Support Services by calling (206)
454-2030.

C Extensions and How to Write and Use Them

C extensions allow you to further customize the editor by creating new
editor functions and switches through programs that you write in the C
programming language. They are much more powerful than macros because
macros depend on the existence of editor functions.

C extensions are compiled with a special memory-model that does not
use a main() function, but rather uses special names and structures
that the editor alone recognizes. They are linked with an object
module that makes low-level functions used within the editor itself
available to be called by your C extension. The file produced from
linking is separate from the main program but is loaded into memory
with the editor. The editor then will call your module whenever you
invoke one of your C extension functions.

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