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From: Richard Mueller [MVP] on 31 Jan 2007 17:58
I would say you cannot use WmiSetBrightness in VBScript, as there is no way
to create a 64-bit value. It's similar to the problem we have attempting to
assign values to Integer8 attributes in Active Directory.

--
Richard
Microsoft MVP Scripting and ADSI
Hilltop Lab web site - http://www.rlmueller.net
--

"mr_unreliable" <kindlyReplyToNewsgroup(a)notmail.com> wrote in message
news:eAXZAJxEHHA.996(a)TK2MSFTNGP02.phx.gbl...
> hi Adam,
>
> This could get tricky.
>
> I suggest attempting to use the vbs type-conversion routines,
> for example, CByte(100) might give you an unsigned 8-bit
> integer.
>
> Unfortunately, there is no native vbs 64-bit integer, but you
> might try playing around with the currency (or date) type.
>
> The real trickiness comes with how far wmi goes with its
> type-checking. That is, there ARE variants of subtype
> unsigned integer, but not available to vbscripters. If
> wmi is looking at the "variant type" of the variant typedef,
> then you may be unable to use that feature from script
> without some bit-twiddling.
>
> Just in case you DO happen to be up for a bit of bit-twiddling,
> here is a table of the valid variant types.
>
> * VARENUM usage key,
> *
> * * [V] - may appear in a VARIANT
> * * [T] - may appear in a TYPEDESC
> * * [P] - may appear in an OLE property set
> * * [S] - may appear in a Safe Array
> *
> *
> * VT_EMPTY [V] [P] nothing
> * VT_NULL [V] [P] SQL style Null
> * VT_I2 [V][T][P][S] 2 byte signed int
> * VT_I4 [V][T][P][S] 4 byte signed int
> * VT_R4 [V][T][P][S] 4 byte real
> * VT_R8 [V][T][P][S] 8 byte real
> * VT_CY [V][T][P][S] currency
> * VT_DATE [V][T][P][S] date
> * VT_BSTR [V][T][P][S] OLE Automation string
> * VT_DISPATCH [V][T][P][S] IDispatch *
> * VT_ERROR [V][T][P][S] SCODE
> * VT_BOOL [V][T][P][S] True=-1, False=0
> * VT_VARIANT [V][T][P][S] VARIANT *
> * VT_UNKNOWN [V][T] [S] IUnknown *
> * VT_DECIMAL [V][T] [S] 16 byte fixed point
> * VT_RECORD [V] [P][S] user defined type
> * VT_I1 [V][T][P][s] signed char
> * VT_UI1 [V][T][P][S] unsigned char
> * VT_UI2 [V][T][P][S] unsigned short
> * VT_UI4 [V][T][P][S] unsigned short
> * VT_I8 [T][P] signed 64-bit int
> * VT_UI8 [T][P] unsigned 64-bit int
> * VT_INT [V][T][P][S] signed machine int
> * VT_UINT [V][T] [S] unsigned machine int
> * VT_VOID [T] C style void
> * VT_HRESULT [T] Standard return type
> * VT_PTR [T] pointer type
> * VT_SAFEARRAY [T] (use VT_ARRAY in VARIANT)
> * VT_CARRAY [T] C style array
> * VT_USERDEFINED [T] user defined type
> * VT_LPSTR [T][P] null terminated string
> * VT_LPWSTR [T][P] wide null terminated string
> * VT_FILETIME [P] FILETIME
> * VT_BLOB [P] Length prefixed bytes
> * VT_STREAM [P] Name of the stream follows
> * VT_STORAGE [P] Name of the storage follows
> * VT_STREAMED_OBJECT [P] Stream contains an object
> * VT_STORED_OBJECT [P] Storage contains an object
> * VT_BLOB_OBJECT [P] Blob contains an object
> * VT_CF [P] Clipboard format
> * VT_CLSID [P] A Class ID
> * VT_VECTOR [P] simple counted array
> * VT_ARRAY [V] SAFEARRAY*
> * VT_BYREF [V] void* for local use
> * VT_BSTR_BLOB Reserved for system use
> */
>
>
>
>
>
> AdamM wrote:
> > Hi all,
> >
> > I am writing a WMI script for screen brightness. I have to pass a value
oif
> > uint8 and uint64. My script below fails with an invalid parameter error
on
> > the last line. What is the proper syntax to pass the uint8 and uint64
> > values?
> >
> > The API I am calling is this:
> >
> > uint32 WmiSetBrightness(
> > uint8 Brightness,
> > uint64 Timeout
> > );
> > Here's the script (the last line is apparently the problem):
> >
> > set services=getobject("winmgmts:root\wmi")
> > set mon=services.get("WmiMonitorBrightnessMethods")
> > mon.WmiSetBrightness 100,1
> >
> > Any tips would be greatly appreciated!
> > Adam
> >
> >


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