> On 17 July 2008, Sean Healy wrote:
> [Eric Roode wrote:]
> >
> > How can I start my programs at the leftmost part of the usable
desktop?
> > How can I ensure that my programs behave sanely with respect to
users'
> > taskbar configuration?
>
> MSDN lists a function called SystemParametersInfo(), but it doesn't
> seem to be available yet in Win32::GUI. (Does anyone know
> differently?)
>
> If it's really important to you, you can look up this function at
> www.msdn.com and then try Win32::API. You will probably also need to
> search online for winuser.h to find the values for the constants you
> want.
>
> I've done this before to get functions that Win32::GUI doesn't yet
> provide. (In particular, I wrote something to determine the default
> icon for a file type and extract it so it could be used in a
> listview.) It can be time-consuming, but if you really want it, it's
> usually possible with Win32::API.
Thanks, Sean, this did work for me. I found that you can pass
SPI_GETWORKAREA to SystemParametersInfo, to get a Rect that contains
the coordinates of the usable desktop area.
For some reason, I could not load SPI_GETWORKAREA via
Win32::GUI::Constants.
I don't know why. The numeric value of SPI_GETWORKAREA is 48. So
here is the code I came up with:
================
use Win32::GUI();
use Win32::API;
Win32::API::Struct->typedef(RECT => qw{LONG x; LONG y; LONG w; LONG
h;});
my $rect = Win32::API::Struct->new('RECT');
my $spi = Win32::API->new(
'user32',
'BOOL SystemParametersInfo(UINT uiAction,
UINT uiParam, LPRECT pvParam, UINT fWinIni)'
);
$spi->Call(48, 0, $rect, 0);
say "(x,y)=($rect->{x},$rect->{y}); (w,h)=($rect->{w},$rect->{h})";
================
Thanks for pointing me in the right direction, Sean.
--
Eric
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