Prevent Form resize on SW_MAXIMIZE

Question

I want to simulate Aero Snap functionality by my own. And for stick Form to a screen's side I'm using solution from this question. The problem is that after I call:

ShowWindow(Handle, SW_MAXIMIZE);

Form immediately maximizes and after call MoveWindow changes it's size to needed size. And this jump of the Form is visible and annoying. To prevent it I tried to disable handling of messages WM_GETMINMAXINFO, WM_SIZE, WM_MOVE, WM_NCCALCSIZE, WM_WINDOWPOSCHANGING, WM_WINDOWPOSCHANGED in WndProc. It helps but not completely. Is there any analog SuspendLayout()/ResumeLayout() for Form resizing?

Answer 1

Disabling message handling in WndProc helped me to reduce flickering (all except WM_NCPAINT):

bool ignoreMessages = false;

public void DockWindow()
{
    ignoreMessages = true;
    ShowWindow(handle, SW_MAXIMIZE);
    ignoreMessages = false;
    MoveWindow(handle, 0, 0, Screen.PrimaryScreen.WorkingArea.Width / 2, Screen.PrimaryScreen.WorkingArea.Height, true);
}

protected override void WndProc(ref Message message)
{
    if (ignoreMessages &&
        message.Msg != WM_NCPAINT)
        return;

    base.WndProc(ref message);
}