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How can I call Windows api such `GetVersion`, `GetSerialNumber` ? I have not found these functions.

You can try to use cinterop to generate bindings onto the `sysinfoapi.h` header including them, and then use it.

`GetVersion()` exists in `platform.windows`. Apparently deprecated in newer Windows versions though according to <https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getversion>

Thanks! I've created `sysinfoapi.def` and have found GetVersion() etc

But result....
```        val version = GetVersion().toLong()
        val version0 = version.toByte()
        val version1 = (version / 256).toByte()
        val version2 = (version / 65536).toShort()
        println("$version/${version.toString(16)} - ${version0}.${version1}.${version2}")```
Result:
`602931718/23f00206 - 6.2.9200`
But...
```C:\&gt;cmd /c ver

Microsoft Windows [Version 10.0.18363.836] ```
Why 6.2 instead of 10.0?

This can be the reason. From the Microsoft documentation above:
&gt; Applications not manifested for Windows 8.1 or Windows 10 will return the Windows 8 OS version value (6.2). 

But new methods will not return version - olny "Is...Or...". How can I get windows version?

It seems to be a Windows API question rather than a Kotlin/Native one. I’ve read through <https://stackoverflow.com/a/39173324/11533773|this>, and maybe you can use this approach: to get system version via the file information of your system DLLs. Why wouldn’t you try going with `IsWindows10OrGreater`?