MDI Form

[DucLinh]

:doh:I designed 2 form. One is MDI form(i named frmMain) and another is child form (i named frmLoggon). On frmMain form i got a menuItem (i named menuItem1) On frmMain Form private void frmMain_Load(object sender, System.EventArgs e) { frmLoggon fLoggon = new frmLoggon(); fLoggon.ShowInTaskbar = false; fLoggon.ShowDialog(this); } On frmLoggon Form i got a button (i named btExit) private void btExit_Click(object sender, System.EventArgs e) { frmMain fMain = new frmMain(); fMain.Menu.MenuItem[0].Enabled = false; this.close(); } but the menuItem1 not disabed. Please help me as posible as you can. Thanks Mr Duc Linh Nguyen

[Meysam Mahfouzi]

frmMain fMain = new frmMain();
fMain.Menu.MenuItem[0].Enabled = false;

You are just disabling the menuitem which resides on temporary MDI instantiated form. It exists only in btExit_Click procedure scope. So you need some permanent refrence to your MDI form. I'd recommend passing the MDI reference as a parameter to your child form's constructor like this:

private void frmMain_Load(object sender, System.EventArgs e)
{
frmLoggon fLoggon = new frmLoggon(this);
fLoggon.ShowInTaskbar = false;
fLoggon.ShowDialog(this);
}

In your frmLoggon constructor:

frmMain _parent;
public frmLoggon(frmMain parent)
{
//save a reference to the MDI form.
_parent = parent;
}

and finally:

private void btExit_Click(object sender, System.EventArgs e)
{
_parent.Menu.MenuItem[0].Enabled = false;
this.close();
}

I hope this helps. abcdabcdabcdabcda Don't forget, that's

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not Arabian gulf!

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[Inpreet Singh]

Hi, I don't know that, what i am goin to tell u is good wayout but I am sure this will work. Ur menuItem is not disable bcoz u r make another instance of the main form n then on that u r making it disabled so u need to disable it with first instance. do one thing take a global integer set it as 0 then check on frmMain_Enter() event. if it is still 0 then don't run Menu.MenuItem[0].Enabled = false; set interger to 0 so that u can chk it correctly again. other run this. Now exiting from frmLoggon thats btExit_Click event set this interger to 1. simple. I hope u understand what I written. Good Bye Inpreet Singh