C# Tell If Form Is Maximising

Question

Ok heres my problem. I have a form that when it is not maximised, its maximum size has to be the total height of the components inside the form. To achieve this, i use this:

    private void resize_form(object sender, EventArgs e)
    {
        this.MaximumSize = new System.Drawing.Size(1000, this.panel4.Height + this.label2.Height + this.HeightMin);
    }

That fires on the Resize event of the form. Because the component size is always changing it made sense to do this on a resize event. How ever if i want to maximise the form, the form just goes to the highest settings defined in this.MaximumSize. So i was wondering is there a way to tell when a form is going to be maximised and set its maximumsize to the screen boundarys before the form maximises.

If there is a better way to change the maximumsize value without resize event, that would also be great :)

Answer 1

I found the answer that suited me perfectly. A lil WndProc override :D (i love WndProc now)

protected override void WndProc(ref Message message)
{
    const int WM_SYSCOMMAND = 0x0112;
    const int SC_MAXIMIZE = 0xF030; 

    switch (message.Msg)
    {
        case WM_SYSCOMMAND:
            int command = message.WParam.ToInt32() & 0xfff0;
            if (command == SC_MAXIMIZE) 
            {
                this.maximize = true;
                this.MaximumSize = new System.Drawing.Size(0, 0);
            }
            break;
    }

    base.WndProc(ref message);
}

private void resize_form(object sender, EventArgs e)
{
    if (!maximize)
    {
        this.MaximumSize = new System.Drawing.Size(1000, this.panel4.Height + this.label2.Height + this.HeightMin);
    }
}

Basically it sets this.maximize to true when it receives teh SC_MAXIMIZE message. The resize event will only set a new MaximumSize if this.maximize is set to false. Nifty xD