RE: [GD-Windows] GetAsyncKeyState / DI

[Tom F. <to...@mu...>]

Unfortunately they don't capture some of the stranger keys in terribly
useful ways.

Tom Forsyth - Muckyfoot bloke and Microsoft MVP.

This email is the product of your deranged imagination,
and does not in any way imply existence of the author.

> -----Original Message-----
> From: Andy Glaister [mailto:an...@mi...]
> Sent: 06 November 2002 21:26
> To: Ignacio Casta=F1o; gam...@li...
> Subject: RE: [GD-Windows] GetAsyncKeyState / DI
>=20
>=20
> Why use GetAsyncKeyState or DirectInput for typical keyboard=20
> handling at all?
>=20
> You are going to get WM_KEYUP and WM_KEYDOWN messages all the=20
> time - it's pretty easy to store these results in an array -=20
> then you can have perfect up/down/pressed notifications that=20
> do not have any input focus issues.
>=20
> Andy.
>=20
> -----Original Message-----
> From: Ignacio Casta=F1o [mailto:cas...@ya...]=20
> Sent: Wednesday, November 06, 2002 10:10 AM
> To: gam...@li...
> Subject: RE: [GD-Windows] GetAsyncKeyState / DI
>=20
>=20
> Wayne Coles wrote:=20
> > Unfortunately the remarks section inside the MSDN=20
> documentation go on=20
> > to
> > say:
> >=20
> > "Although the least significant bit of the return value indicates=20
> > whether the key has been pressed since the last query, due to the=20
> > pre-emptive multitasking nature of Windows, another application can =

> > call GetAsyncKeyState and receive the "recently pressed"=20
> bit instead=20
> > of your application. The behavior of the least significant=20
> bit of the=20
> > return value is retained strictly for compatibility with 16-bit=20
> > Windows applications (which are non-preemptive) and should not be=20
> > relied upon."
> >=20
> > So you can't really rely upon this bit being set correctly.
>=20
> Exactly, that's what I meant, the interface of=20
> GetAsyncKeyState is nice, but the real behaviour is not.
>=20
>=20
> Ignacio Casta=F1o
> cas...@ya...
>=20
>=20
> _______________________________________________________________
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>=20
>=20
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