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Accessing Windows Idle Time with Go
This guide provides a solution to retrieving the idle time of a Windows system using Golang.
Accessing Windows API in Go
Getting Windows-specific system information requires using the syscall package. To access the API, you will need to obtain godoc and run it locally:
go get golang.org/x/tools/cmd/godoc godoc --http=:6060
Then, open http://127.0.0.1:6060/ in a web browser.
Getting Last Input Info
Go does not have a direct API for GetLastInputInfo(). However, you can call it directly from the DLL:
<code class="go">user32 := syscall.MustLoadDLL("user32.dll") getLastInputInfo := user32.MustFindProc("GetLastInputInfo")</code>
Setting Up a Structure
Define a structure to hold the return value:
<code class="go">type LastInputInfo struct { cbSize uint32 dwTime uint32 }</code>
Initialize the cbSize field with the size of the structure:
<code class="go">var lastInputInfo LastInputInfo lastInputInfo.cbSize = uint32(unsafe.Sizeof(lastInputInfo))</code>
Calling GetLastInputInfo
Pass a pointer to the structure to the function:
<code class="go">_, _, err := getLastInputInfo.Call( uintptr(unsafe.Pointer(&lastInputInfo)))) if err != nil { panic("error getting last input info: " + err.Error()) }</code>
Remember to import syscall and unsafe.
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