Need help with writing wrapper for WTSQuerySessionInformationW using WTSSessionInfoEx

[avaidhyajc]

Hi, I am creating an app which requires me to check system lock/unlock state . I cannot use system events as i need to know the current state.I came across https://learn.microsoft.com/en-us/windows/win32/api/wtsapi32/nf-wtsapi32-wtsquerysessioninformationw which when used with WTSSessionInfoEx(25) helps to get session state using sessionFlags.

Given that it's not implemented , i tried my hand to implement SessionInfoEx ; But unfortunately i am not able to do it as i'm quiet new to golang paradigm.

Any help on this with code will be of greater value to me.Thanks in Advance

[dgolub]

Is this issue intended as a feature request or a request for help as a contributor? If it's the latter, are there any specific questions that I can answer?

[avaidhyajc]

@dgolub Thanks for looking into this. For this struct , i implemented an equivalent in go

	type WTSInfoexlevel1 struct {
		SessionId               uint32
		SessionState            uint32
		SessionFlags            int64
		WinStationName          *uint16
		UserName                *uint16
		DomainName              *uint16
		LogonTime               int64
		ConnectTime             int64
		DisconnectTime          int64
		LastInputTime           int64
		CurrentTime             int64
		IncomingBytes           uint32
		OutgoingBytes           uint32
		IncomingFrames          uint32
		OutgoingFrames          uint32
		IncomingCompressedBytes uint32
		OutgoingCompressedBytes uint32
	}
	type WTSInfoEX struct {
		level uint32
		Data  WTSInfoexlevel1
	}

Can you please confirm if this is correct ? Also , if you could convert it into a new feature request , it will be really helpful!

[avaidhyajc]

I am not sure how should i read SessionFlags . Irrespective of screen lock/unlock events , i always get the value 31244010177691649

[dgolub]

So, the strings in this structure are fixed-length strings, not pointers to strings. So, you'd need to do it like this:

WinStationName [WINSTATIONNAME_LENGTH + 1]uint16

[avaidhyajc]

Would this cause a problem in reading SessionFlags . ? Can you please share the complete struct which you would use to get the values .

[dgolub]

No, that's the correct structure to match what you receive from Windows. You'd just need to change those three string fields.

[avaidhyajc]

It will be great if you could take this as a Feature Request.

Also , i need to launch an application in user context from service for which i need to impersonate token. Can you please point me to the wrapper that will help me to achieve this.

[dgolub]

I'll take a look at some point when I've got some time over a weekend.