Question

I have a dialog implemented in WinForms that is shown as a notify dialog on the bottom right of the screen. The problem is that whenever is shown it takes the focus and this happens only when TopMost = true. How can I solve this?

Answer 1

You need to inherit from Form and override a couple of properties:

[Flags]
enum WS_EX
{
    TOPMOST = 0x00000008,
}

class TopMostForm : Form
{
    protected override CreateParams CreateParams
    {
        get
        {
            var baseParams = base.CreateParams;
            baseParams.ExStyle |= (int)WS_EX.TOPMOST;
            return baseParams;
        }
    }

    protected override bool ShowWithoutActivation
    {
        get { return true; }
    }
}

Then just simply Show() on this form and it will be displayed as topmost and inactive.