Re: properties, VT types, and Win32::OLE
Jan Dubois wrote:
On Mon, 04 Feb 2008, Michael Ellery wrote:
Given some object and a property:
my $obj = new Win32::OLE(SOME.class);
my $val = $obj-{SomeProperty};
...is there some way to determine the VT type of $val (or of
SomeProperty, equivalently). I often run into strange problems where I
expect a 32 bit negative value from some property, but when I simply
print it, perl shows it as a large positive value. It is bit
equivalent to the expected negative value, but somehow not being
interpreted with the corrected sign-ed-ness. The first thing I would
like to check is the VT type that Win32::OLE thought it got -- then
I'll see if I agree with how Win32::OLE is converting to perl scalars
based on the VT type.
I haven't tested this, but you should be able to do something like this:
my $prop = Win32::OLE::Variant-new();
$obj-Dispatch('SomeProperty', $prop);
print V_VT(prop)=%d\n, $prop-Type);
With two minor syntax fixes to the print line, this works great. Thanks!
-Mike
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RE: properties, VT types, and Win32::OLE
On Mon, 04 Feb 2008, Michael Ellery wrote:
Given some object and a property:
my $obj = new Win32::OLE(SOME.class);
my $val = $obj-{SomeProperty};
...is there some way to determine the VT type of $val (or of
SomeProperty, equivalently). I often run into strange problems where I
expect a 32 bit negative value from some property, but when I simply
print it, perl shows it as a large positive value. It is bit
equivalent to the expected negative value, but somehow not being
interpreted with the corrected sign-ed-ness. The first thing I would
like to check is the VT type that Win32::OLE thought it got -- then
I'll see if I agree with how Win32::OLE is converting to perl scalars
based on the VT type.
I haven't tested this, but you should be able to do something like this:
my $prop = Win32::OLE::Variant-new();
$obj-Dispatch('SomeProperty', $prop);
print V_VT(prop)=%d\n, $prop-Type);
Cheers,
-Jan
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