public frmMain()
{
InitializeComponent();
map = new Map();
this.dropdownBGtype.SelectedIndex = 0;
}
private void mnuFileOpen_Click(object sender, EventArgs e)
{
if (diaOpen.ShowDialog() == System.Windows.Forms.DialogResult.OK) {
map = new Map();
map.Load(diaOpen.FileName);
resetUI();
}
}