private void ExtendVolumeForm_Load(object sender, EventArgs e) { long numberOfExtentBytesAvailable = ExtendHelper.GetMaximumSizeToExtendVolume(m_volume); long numberOfMBAvailable = numberOfExtentBytesAvailable / 1024 / 1024; numericAdditionalSize.Maximum = numberOfMBAvailable; numericAdditionalSize.Value = numberOfMBAvailable; btnOK.Enabled = (numberOfMBAvailable > 0); }