Thread View: comp.os.os2.programmer.misc
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2 total messages
Started by Keith R. Bennett
Mon, 25 Apr 1994 18:56
KC_VIRTUALKEY flag of WM_CHAR message
Author: Keith R. Bennett
Date: Mon, 25 Apr 1994 18:56
Date: Mon, 25 Apr 1994 18:56
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Where does the KC_VIRTUALKEY flag get set by OS/2 or PM? Is it a signal or status of the keyboard controller, or does it set it if it sees a scan code which it thinks is a virtual key? Thanks for any answers... - Keith -- -------------------------------------------------------------------------- Keith Bennett Bennett Business Solutions, Inc. C++/C Software Development 1605 Ingram Terrace kbennett@access.digex.net Silver Spring, MD USA 20906-5932
Re: KC_VIRTUALKEY flag of WM_CHAR message
Author: David Charlap
Date: Tue, 26 Apr 1994 20:34
Date: Tue, 26 Apr 1994 20:34
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Keith R. Bennett <kbennett@access1.digex.net> wrote: >Where does the KC_VIRTUALKEY flag get set by OS/2 or PM? By PM. Non-PM apps don't receive WM_CHAR messages! In the WM_CHAR message, there are many fields. One of them, the vKey field, is used when the key pressed doesn't correspond to a character in the currently active codepage. The KC_VIRTUALKEY flag is set when this field contains valid data. >Is it a signal or status of the keyboard controller, or does it set >it if it sees a scan code which it thinks is a virtual key? The keybaord controller only deal with scan codes and shift masks. This data is stored in the WM_CHAR message. The other data, though - the character and vkey codes - are produced by PM and the keyboard device driver. Why do you need to know? If you need keyboard access in a non-PM application, you won't be using WM_CHAR messages to do it anyway. Right now, you have to use DosDevIOCtl functions, stream I/O, or 16-bit APIs to access the keyboard without PM. The 16-bit Kbd* calls are probably easiest to use for now. There are 32-bit equivalents of most of these calls, but you'll need IBM's Developer's Connection CD to get the headers and documentation to use them. -- David Charlap | The contents of this message are not the opinions of david@visix.com | Visix Software, or of anyone besides myself. Visix Software, Inc. +----------------------------------------------------- Member of Team-OS/2 | ---------------------+
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