C# can't Access Code from (internal struct)

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this is my code

C#

public Form1()
 {
     LASTINPUTINFO lastInPut = new LASTINPUTINFO();
     lastInPut.cbSize = (uint)
       System.Runtime.InteropServices.Marshal.SizeOf(lastInPut);

     InitializeComponent();
 }

and

C#

[DllImport("User32.dll")]
private static extern bool
        GetLastInputInfo(ref LASTINPUTINFO plii);

internal struct LASTINPUTINFO
{
    public uint cbSize;

    public uint dwTime;
}

and this is me trying to access the dwTime

C#

private void Form1_Load(object sender, EventArgs e)
   {
    
 this.Text = dwTime.toString();
   }

but it obously doesn't work, i should be able to access it because i made it public, why??

Posted 30-Aug-12 0:59am

C.CoderCreator

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2 solutions

Solution 1

No, a public property cannot be accessed without specifying the object. Without telling the compiler where your "dwTime" is coming from, it will not be able to find it.

lastInPut.dwTime

Posted 30-Aug-12 1:02am

Eddy Vluggen

Comments

[no name] 30-Aug-12 7:09am

I understand. I just tried the code

this.Text = lastInPut.dwTime;

but its telling me that lastInPut doesn't exist in the current context

Eddy Vluggen 30-Aug-12 7:13am

Because it doesn't; it only exists as a local variable in your constructor. Make it a private class-level variable, and you can access it.

[no name] 30-Aug-12 7:22am

I don't know if i can :(

LASTINPUTINFO lastInPut = new LASTINPUTINFO();
lastInPut.cbSize = (uint)

has to be in the Initialize

Kumar, Ravikant 30-Aug-12 8:04am

As suggested, declare it as private member and initialize in constructor. Simple.
private LASTINPUTINFO lastInPut;
public Form1()
{
lastInPut = new LASTINPUTINFO();
}

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Eddy Vluggen · Accepted Answer · 2012-08-30T01:56:00

Solution 2

private LASTINPUTINFO lastInPut;
public Form1()
       {
           lastInPut = new LASTINPUTINFO();
           lastInPut.cbSize = (uint)
             System.Runtime.InteropServices.Marshal.SizeOf(lastInPut);

           InitializeComponent();
       }

Try again.

You might want to head to the library and get a good book for beginners; declaring variables is not difficult, but it's not a good idea to continue doing more complexer things without the basics.

Posted 30-Aug-12 1:56am

Eddy Vluggen

Comments

Andreas Gieriet 30-Aug-12 14:29pm

See his Q&A Questions and his Comments. He's ignorant on such advise... Even he very much needs it... And if you ask some question back, you get weird responses. Sad.
Cheers
Andi

[no name] 30-Aug-12 18:26pm

This ha nothing to do with the question please remove your comment

Andreas Gieriet 1-Sep-12 4:18am

It has to do with many of your questions, so, this is just one of them.
You have to face reality: If you don't know how to set a variable (or a field, etc.), you need to go back to the very basics and learn these. You got that advise in many of your questions and you obviously still continue to ignore that advise.
Please keep in mind that everyone who answers a question implicitly assumes some common ground where he starts to give an answer. If that common ground is not given, then it's time to get to a common ground. That is clearly a task on your side. No one here is probably assuming that he needs to explain how to set a variable.
You ask questions where I must assume that you know the basics - but your followup questions show differently.
Please, please, go back and take that advise to learn the very basics first, for the benefit of you and all of us.
Cheers
Andi