Here's a couple ways to do it (tested on j-64):
NB. let J manage the memory
z=: 2000 $ 'x'
'len max var'=:'kernel32 GetLogicalDriveStringsW x x *s' cd (2000;z)
(len*JCHAR){.var
NB. manually allocate the memory
z2=: mema 2000
'len max var'=:'kernel32 GetLogicalDriveStringsW x x x' cd (2000;z2)
memr z2,0,(len*JCHAR)
memf z2
JVERSION
Engine: j803/2014-10-19-11:11:11
Library: 8.04.11
Qt IDE: 1.4.4/5.4.2
Platform: Win 64
Installer: J804 install
InstallPath: c:/users/joe bogner/j64-804
On Thu, Oct 22, 2015 at 8:01 PM, bill lam <[email protected]> wrote:
> DWORD is uint32 : i
> LPTSTR is pointer to string, 2 versions,
> ascii version : *c
> unicode version : *w
> usually add suffix A for ascii, W for unicode version of function names.
>
> also look at the bottom of page to confirm the name of dll, in this case
> kernel32.dll
>
> 'kernel32 GetLogicalDriveStringsA i i *c'&cd
>
> 'kernel32 GetLogicalDriveStringsW i i *w'&cd
> On Oct 23, 2015 2:56 AM, "Devon McCormick" <[email protected]> wrote:
>
> > So, if I want to translate this call as shown on MSDN:
> > DWORD WINAPI GetLogicalDriveStrings(
> >
> > _In_ DWORD nBufferLength,
> > _Out_ LPTSTR lpBuffer
> > );
> >
> > I need to do something like 'kernel32 GetLogicalDriveStrings i *'&cd ?
> >
> >
> > On Thu, Oct 22, 2015 at 12:35 PM, bill lam <[email protected]> wrote:
> >
> > > You can still cpoy from the j602 winapi.dat file, eg
> > > the line
> > > kernel32 ReadFile i i * i *i *
> > >
> > > tell you the signature for ReadFile, and call it as
> > >
> > > 'kernel32 ReadFile i i * i *i *'&cd your parameters...
> > >
> > > However the signatures inside this winapi.dat are only correct
> > > for 32-bit windows. Anyways you most likely need to google MSDN
> > > because winapi.dat didn't tell anything about the meaning of each
> > > argument.
> > >
> > > Чт, 22 окт 2015, Devon McCormick написал(а):
> > > > Can I figure out how to do this for the call I need by looking at one
> > of
> > > > the existing API packages?
> > > >
> > > >
> > > > On Thu, Oct 22, 2015 at 11:38 AM, chris burke <[email protected]>
> > > wrote:
> > > >
> > > > > It got dropped. The old winapi dated back to the Win95 days and
> was a
> > > > > straight dump of VB calls. Some time ago we decided it was too out
> of
> > > date
> > > > > to distribute, and that it would be better to use MSDN.
> > > > >
> > > > > On 22 October 2015 at 07:48, Devon McCormick <[email protected]>
> > > wrote:
> > > > >
> > > > > > I understand the forum traffic is light since we're all riveted
> by
> > > the
> > > > > > possibility of a Mets/Blue Jays world series, but I do have a
> > > J-related
> > > > > > question.
> > > > > >
> > > > > > While attempting to load some old code, I get an error trying to
> > load
> > > > > > "winapi". I see a number of particular API libraries in the
> > addons,
> > > but
> > > > > > not this one. Does anyone know if there's a replacement for this
> > or
> > > did
> > > > > it
> > > > > > get dropped?
> > > > > >
> > > > > > Thanks,
> > > > > >
> > > > > > Devon
> > > > > > --
> > > > > >
> > > > > > Devon McCormick, CFA
> > > > > >
> > > > > > Quantitative Consultant
> > > > > >
> > > ----------------------------------------------------------------------
> > > > > > For information about J forums see
> > > http://www.jsoftware.com/forums.htm
> > > > > >
> > > > >
> > ----------------------------------------------------------------------
> > > > > For information about J forums see
> > http://www.jsoftware.com/forums.htm
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > >
> > > > Devon McCormick, CFA
> > > >
> > > > Quantitative Consultant
> > > >
> ----------------------------------------------------------------------
> > > > For information about J forums see
> http://www.jsoftware.com/forums.htm
> > >
> > > --
> > > regards,
> > > ====================================================
> > > GPG key 1024D/4434BAB3 2008-08-24
> > > gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3
> > > gpg --keyserver subkeys.pgp.net --armor --export 4434BAB3
> > > ----------------------------------------------------------------------
> > > For information about J forums see http://www.jsoftware.com/forums.htm
> > >
> >
> >
> >
> > --
> >
> > Devon McCormick, CFA
> >
> > Quantitative Consultant
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
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