Sigbjorn Finne wrote:
Hi Wilkes,
you may want to have a look at a simple example of how to interop with Windows WMI using the COM package at --
http://haskell.forkio.com/com-examples I try compile WMIDemo.hs but recive error: [code] c:\htest>ghc --make WMIDemo.hs [2 of 2] Compiling WMIDemo ( WMIDemo.hs, WMIDemo.o )
WMIDemo.hs:24:2: Couldn't match expected type `[a]' against inferred type `(a1, b)' In the pattern: (_, ls) In a stmt of a 'do' expression: (_, ls) <- is # enumVariants In the second argument of `($)', namely `do obj <- Auto.getObject "winmgmts:\\\\.\\root\\CIMV2" is <- obj # instancesOf "Win32_OperatingSystem" (Nothing :: Maybe Int) (Nothing :: Maybe (IDispatch ())) (_, ls) <- is # enumVariants case ls of { [] -> fail "Hmm..no OS information available; expected at least one." (wmi_os : _) -> do ... }' [/code] ghc 6.10.1 com-1.2.1 Windows Vista Home Ru + sp1