Cancel A WinForm Minimize?

Question

I have a winform with the minimizeMaximizeClose buttons disabled, but still if someone presses it in the task bar, it will minimize. I want to prevent this from happening.

Answer 1

Override WndProc on your form, listen for minimize messages and cancel.

Add this code to your form:

private const int WM_SYSCOMMAND = 0x0112; 
private const int SC_MINIMIZE = 0xf020; 

 protected override void WndProc(ref Message m) 
{ 
    if (m.Msg == WM_SYSCOMMAND) 
    { 
        if (m.WParam.ToInt32() == SC_MINIMIZE) 
        { 
            m.Result = IntPtr.Zero; 
            return; 
        } 
    } 
    base.WndProc(ref m); 
} 

I modified Rob's code found in this SO thread:
How to disable the minimize button in C#?

Works great: no flickering, no nothing when the user attempts to minimize.