C# Signature:

[DllImport("user32.dll")]
static extern int GetLastInputInfo(ref LASTINPUTINFO plii);

VB Signature:

<DllImport("user32.dll")> _
Shared Function GetLastInputInfo(ByRef plii As LASTINPUTINFO) As Integer
End Function

User-Defined Types:

LASTINPUTINFO

Notes:

Very usefull to detect user-idle state of an application

Tips & Tricks:

Please add some!

Sample Code:

This function retrieves the time since last user input

    static int GetLastInputTime()
    {
        int idleTime = 0;
        LASTINPUTINFO lastInputInfo = new LASTINPUTINFO();
        lastInputInfo.cbSize = Marshal.SizeOf( lastInputInfo );
        lastInputInfo.dwTime = 0;

        int envTicks = Environment.TickCount;

        if( GetLastInputInfo( ref lastInputInfo ) )
        {
        int lastInputTick = lastInputInfo.dwTime;

        idleTime = envTicks - lastInputTick;
        }

        return (( idleTime > 0 ) ? ( idleTime / 1000 ) : idleTime );
    }

Alternative Managed API:

Do you know one? Please contribute it!

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).