// Add keyboard shortcuts to search. private void ComboBoxSearch_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Tab) // Move focus to tweaks. { DataGridViewTweaks.Focus(); e.SuppressKeyPress = true; } else if (e.Control && e.KeyCode == Keys.Space) // Show category dropdown. { ComboBoxSearch.DroppedDown = true; e.SuppressKeyPress = true; } }