How to use "GetLastInputInfo" in "user32.dll"

[SebBourgeois]

      Hi,

I need to logout user if he doesn't make action during 5 minutes, "GetLastInputInfo" method in the "user32.dll" library, return the tick of the last action, so I can know the inactivity time of the login user.

But I try to using "Call Dll function" item in Labview 8.1, and each time I run VI, Labview crash.

Next, is information about the method :

DLL
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User32.dll

Syntax
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BOOL GetLastInputInfo(PLASTINPUTINFO plii);

Parameters
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plii : [out] Pointer to a LASTINPUTINFO structure that receives the time of the last input event.

Private Type LASTINPUTINFO
    cbSize As Long
    dwTime As Long
End Type

Return Value
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If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero.

Remarks
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This function is useful for input idle detection. However, GetLastInputInfo does not provide system-wide user input information across all running sessions. Rather, GetLastInputInfo provides session-specific user input information for only the session that invoked the function.

You can see also my VI source.

[smercurio_fc]

Change your calling convention to "WINAPI". You have to use this calling convention when calling Windows API functions.

Note: Depending on how you have it set up you may be able to just use an Event Structure's Timeout event.

[SebBourgeois]

Oki for WINAPI, but it doesn't work anyway, Can you explain me what is an "Event Structure's Timeout event". Maybe you can make a little sample. Thanls.

[MikeS81]

Hi SebBourgeois,

now it works, see the attachment.

Mike

[parthabe]

When you place an Event Structure on the BD, by default it ll show the Timeout event.

If you rt-click on the ES border & tell Edit Events handled by this case..., you can see that this Timeout event is owned by the application itself, not by any individual control/indicator present on the FP of teh VI [Application].

[SebBourgeois]

Thanks a lot, now I know how to get a Cluster size wich is my real trouble.

[parthabe]

Use the All Objects[] or teh Controls[] property of the cluster to get that array of all the controls/indicators inside a cluster & wire this to the Array Size function to get the size of the cluster.