protected override void OnClick()
{
string straboPath = Environment.GetEnvironmentVariable(ArcStrabo10Extension.EnvironmentVariableSTRABO_HOME, EnvironmentVariableTarget.User);
if (!string.IsNullOrEmpty(straboPath))
{
ArcMap.Application.CurrentTool = null;
MessageBox.Show(straboPath);
}
else
MessageBox.Show(ArcStrabo10Extension.ErrorMsgNoStraboHome);
}