Suppress form maximization on title double-click

Posted on 2010-11-18
Last Modified: 2012-06-21
I'm using c# 4.0. I have a form that has a title bar. I want to suppress the ability to maximize the form by double clicking it.

I've tried

private void Form1_Load(object sender, EventArgs e) {
this.SetStyle(ControlStyles.StandardDoubleClick, false);

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but that doesn't do it. I've tried trapping the click event but don't know how to suppress it.

Question by:BlearyEye
LVL 28

Expert Comment

ID: 34168152
Do you allow resizing of the window? If not, make sure you specify the max window size. If you do allow resizing, I don't think this can be changed.
LVL 85

Accepted Solution

Mike Tomlinson earned 500 total points
ID: 34168304
Like this?

public partial class Form1 : Form


        public Form1()




        const int HTCAPTION = 0x2;

        const int WM_NCLBUTTONDBLCLK = 0xA3;

        protected override void WndProc(ref Message m)


            switch (m.Msg)


                case WM_NCLBUTTONDBLCLK:

                    if (m.WParam.ToInt32() == HTCAPTION)






            base.WndProc(ref m);



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Author Closing Comment

ID: 34168976
Perfect, thanksl

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