winapi - Using Golang to get Windows idle time (GetLastInputInfo or similar) -

is there example or method of getting windows system's idle time using go?
i've been looking @ documentation @ golang site think i'm missing how access (and use) api system information including idle time.

go's website hardcoded show documentation standard library packages on linux. need godoc , run yourself:

go golang.org/x/tools/cmd/godoc godoc --http=:6060 

then open http://127.0.0.1:6060/ in web browser.

of note package syscall, provides facilities accessing functions in dlls, including utf-16 helpers , callback generation functions.

doing quick recursive search of go tree says doesn't have api getlastinputinfo() in particular, unless i'm missing something, should able call function dll directly:

user32 := syscall.mustloaddll("user32.dll") // or newlazydll() defer loading getlastinputinfo := user32.mustfindproc("getlastinputinfo") // or newproc() if used newlazydll() // or can handle errors in above if want provide alternative r1, _, err := getlastinputinfo.call(uintptr(arg)) // err non-nil; need check r1 (the return value) if r1 == 0 { // in case     panic("error getting last input info: " + err.error()) } 

your case involves structure. far know, can recreate structure flat (keeping fields in same order), must convert int fields in original int32, otherwise things break on 64-bit windows. consult windows data types page on msdn appropriate type equivalents. in case, be

var lastinputinfo struct {     cbsize uint32     dwtime uint32 } 

because (like many structs in windows api) has cbsize field requires initialize size of struct, must too:

lastinputinfo.cbsize = uint32(unsafe.sizeof(lastinputinfo)) 

now need pass pointer lastinputinfo variable function:

r1, _, err := getlastinputinfo.call(     uintptr(unsafe.pointer(&lastinputinfo))) 

and remember import syscall , unsafe.

all args dll/lazydll.call() uintptr, r1 return. _ return never used on windows (it has abi used).

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since went on of need know use windows api in go can't gather reading syscall docs, (and irrelevant above question) if function has both ansi , unicode versions, should use unicode versions (w suffix) , utf-16 conversion functions in package syscall best results.

i think that's info (or anyone, matter) need use windows api in go programs.