SDK for Windows 1.04??

From: George Currie <>
Date: Thu Jun 21 15:26:24 2001

Two different concepts. The DOS tech refs are refering to the values to place in ah (I think, or was it al?) before making a DOS or BIOS int call. This is all pre-DLL days. Richard is referring to
the ordinal number within a DLL to reference a specific function located in the DLL. Not all functions in a dll have their names exported and sometimes the only way to get to them is by ordinal
number. This is one way that M$ creates 'value added' to their software by utilizing these undocumented calls.


On Thu, 21 Jun 2001 13:42:53 -0400, John Allain wrote:

>From: Cini, Richard <>
>> most of the functions in the DOS Shell code (MSDOS.exe
>> and MSDOSD.exe) are referenced by ordinal number
>Early (most?) DOS techinical reference
>manuals listed function calls by numbers,
>E.G. 10H = Close file. 01H = Keyboard input, etc.
>Could this be it?
>John A.
Received on Thu Jun 21 2001 - 15:26:24 BST

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