public bool EditingControlWantsInputKey()

in sqlnexus/fmParameters.cs [1192:1249]
41 lines of code
16 McCabe index (conditional complexity)

        public bool EditingControlWantsInputKey(Keys keyData, bool dataGridViewWantsInputKey)
        {
            switch (keyData & Keys.KeyCode)
            {
                case Keys.Right:
                    //
                    // If the end of the selection is at the end of the string
                    // let the DataGridView treat the key message
                    //
                    if (!(this.SelectionLength == 0
                          && this.SelectionStart == this.ToString().Length))
                    {
                        return true;
                    }
                    break;

                case Keys.Left:
                    //
                    // If the end of the selection is at the begining of the
                    // string or if the entire text is selected send this character 
                    // to the dataGridView; else process the key event.
                    //
                    if (!(this.SelectionLength == 0
                          && this.SelectionStart == 0))
                    {
                        return true;
                    }
                    break;

                case Keys.Home:
                case Keys.End:
                    if (this.SelectionLength != this.ToString().Length)
                    {
                        return true;
                    }
                    break;

                case Keys.Prior:
                case Keys.Next:
                    if (this.valueChanged)
                    {
                        return true;
                    }
                    break;

                case Keys.Delete:
                    if (this.SelectionLength > 0 || this.SelectionStart < this.ToString().Length)
                    {
                        return true;
                    }
                    break;
            }

            //
            // defer to the DataGridView and see if it wants it.
            //
            return !dataGridViewWantsInputKey;
        }