show custom dialog on bad input (#63)

* show custom dialog on bad input

fixes #62

* Update MessageDialog constructor args

1 files changed, 24 insertions, 0 deletions

diff --git a/grapher/MessageDialog.cs b/grapher/MessageDialog.cs
new file mode 100644
index 0000000..0e153f8
--- /dev/null
+++ b/grapher/MessageDialog.cs
@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace grapher
+{
+    public partial class MessageDialog : Form
+    {
+        public MessageDialog(string message, string title = "")
+        {
+            InitializeComponent();
+            Icon = Icon.ExtractAssociatedIcon(Application.ExecutablePath);
+            Text = title;
+            messageLabel.Text = message;
+        }
+
+    }
+}