Done for today

Form1.Designer.cs

@@ -28,9 +28,6 @@
         /// </summary>
         private void InitializeComponent()
         {
-            groupBox1 = new GroupBox();
-            radioButton2 = new RadioButton();
-            radioButton1 = new RadioButton();
             panel1 = new Panel();
             groupBox3 = new GroupBox();
             button2 = new Button();
@@ -42,59 +39,29 @@
             fileToolStripMenuItem = new ToolStripMenuItem();
             helpToolStripMenuItem = new ToolStripMenuItem();
             aboutToolStripMenuItem = new ToolStripMenuItem();
+            renderToolStripMenuItem = new ToolStripMenuItem();
+            fontFamilyToolStripMenuItem = new ToolStripMenuItem();
+            serifToolStripMenuItem = new ToolStripMenuItem();
+            sansSerifToolStripMenuItem = new ToolStripMenuItem();
+            forceMonospaceToolStripMenuItem = new ToolStripMenuItem();
             Opener = new OpenFileDialog();
             Saver = new SaveFileDialog();
-            groupBox1.SuspendLayout();
+            groupBox4 = new GroupBox();
+            chromiumWebBrowser1 = new CefSharp.WinForms.ChromiumWebBrowser();
+            button4 = new Button();
+            progressBar1 = new ProgressBar();
+            button3 = new Button();
             panel1.SuspendLayout();
             groupBox3.SuspendLayout();
             groupBox2.SuspendLayout();
             menuStrip1.SuspendLayout();
+            groupBox4.SuspendLayout();
             SuspendLayout();
             // 
-            // groupBox1
-            // 
-            groupBox1.Controls.Add(radioButton2);
-            groupBox1.Controls.Add(radioButton1);
-            groupBox1.Dock = DockStyle.Left;
-            groupBox1.Location = new Point(0, 0);
-            groupBox1.Name = "groupBox1";
-            groupBox1.Size = new Size(126, 67);
-            groupBox1.TabIndex = 0;
-            groupBox1.TabStop = false;
-            groupBox1.Text = "File mode";
-            // 
-            // radioButton2
-            // 
-            radioButton2.AutoSize = true;
-            radioButton2.Dock = DockStyle.Top;
-            radioButton2.FlatStyle = FlatStyle.System;
-            radioButton2.Location = new Point(3, 39);
-            radioButton2.Name = "radioButton2";
-            radioButton2.Size = new Size(120, 20);
-            radioButton2.TabIndex = 1;
-            radioButton2.Text = "Render mode";
-            radioButton2.UseVisualStyleBackColor = true;
-            // 
-            // radioButton1
-            // 
-            radioButton1.AutoSize = true;
-            radioButton1.Checked = true;
-            radioButton1.Dock = DockStyle.Top;
-            radioButton1.FlatStyle = FlatStyle.System;
-            radioButton1.Location = new Point(3, 19);
-            radioButton1.Name = "radioButton1";
-            radioButton1.Size = new Size(120, 20);
-            radioButton1.TabIndex = 0;
-            radioButton1.TabStop = true;
-            radioButton1.Text = "Converter mode";
-            radioButton1.UseVisualStyleBackColor = true;
-            radioButton1.CheckedChanged += radioButton1_CheckedChanged;
-            // 
             // panel1
             // 
             panel1.Controls.Add(groupBox3);
             panel1.Controls.Add(groupBox2);
-            panel1.Controls.Add(groupBox1);
             panel1.Dock = DockStyle.Top;
             panel1.Location = new Point(0, 24);
             panel1.Name = "panel1";
@@ -106,9 +73,9 @@
             groupBox3.Controls.Add(button2);
             groupBox3.Controls.Add(textBox2);
             groupBox3.Dock = DockStyle.Fill;
-            groupBox3.Location = new Point(439, 0);
+            groupBox3.Location = new Point(401, 0);
             groupBox3.Name = "groupBox3";
-            groupBox3.Size = new Size(361, 67);
+            groupBox3.Size = new Size(399, 67);
             groupBox3.TabIndex = 2;
             groupBox3.TabStop = false;
             groupBox3.Text = "Input file";
@@ -119,7 +86,7 @@
             button2.FlatStyle = FlatStyle.System;
             button2.Location = new Point(3, 42);
             button2.Name = "button2";
-            button2.Size = new Size(355, 22);
+            button2.Size = new Size(393, 22);
             button2.TabIndex = 3;
             button2.Text = "Select file";
             button2.UseVisualStyleBackColor = true;
@@ -131,7 +98,7 @@
             textBox2.Location = new Point(3, 19);
             textBox2.Name = "textBox2";
             textBox2.PlaceholderText = "Type path or select file below. ";
-            textBox2.Size = new Size(355, 23);
+            textBox2.Size = new Size(393, 23);
             textBox2.TabIndex = 2;
             // 
             // groupBox2
@@ -139,9 +106,9 @@
             groupBox2.Controls.Add(button1);
             groupBox2.Controls.Add(textBox1);
             groupBox2.Dock = DockStyle.Left;
-            groupBox2.Location = new Point(126, 0);
+            groupBox2.Location = new Point(0, 0);
             groupBox2.Name = "groupBox2";
-            groupBox2.Size = new Size(313, 67);
+            groupBox2.Size = new Size(401, 67);
             groupBox2.TabIndex = 1;
             groupBox2.TabStop = false;
             groupBox2.Text = "Output file";
@@ -152,7 +119,7 @@
             button1.FlatStyle = FlatStyle.System;
             button1.Location = new Point(3, 42);
             button1.Name = "button1";
-            button1.Size = new Size(307, 22);
+            button1.Size = new Size(395, 22);
             button1.TabIndex = 1;
             button1.Text = "Select path";
             button1.UseVisualStyleBackColor = true;
@@ -164,12 +131,12 @@
             textBox1.Location = new Point(3, 19);
             textBox1.Name = "textBox1";
             textBox1.PlaceholderText = "Type path or select path below. ";
-            textBox1.Size = new Size(307, 23);
+            textBox1.Size = new Size(395, 23);
             textBox1.TabIndex = 0;
             // 
             // menuStrip1
             // 
-            menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem, helpToolStripMenuItem });
+            menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem, helpToolStripMenuItem, renderToolStripMenuItem });
             menuStrip1.Location = new Point(0, 0);
             menuStrip1.Name = "menuStrip1";
             menuStrip1.RenderMode = ToolStripRenderMode.System;
@@ -198,6 +165,40 @@
             aboutToolStripMenuItem.Text = "About";
             aboutToolStripMenuItem.Click += aboutToolStripMenuItem_Click;
             // 
+            // renderToolStripMenuItem
+            // 
+            renderToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { fontFamilyToolStripMenuItem });
+            renderToolStripMenuItem.Name = "renderToolStripMenuItem";
+            renderToolStripMenuItem.Size = new Size(56, 20);
+            renderToolStripMenuItem.Text = "Render";
+            // 
+            // fontFamilyToolStripMenuItem
+            // 
+            fontFamilyToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { serifToolStripMenuItem, sansSerifToolStripMenuItem, forceMonospaceToolStripMenuItem });
+            fontFamilyToolStripMenuItem.Name = "fontFamilyToolStripMenuItem";
+            fontFamilyToolStripMenuItem.Size = new Size(136, 22);
+            fontFamilyToolStripMenuItem.Text = "Font Family";
+            // 
+            // serifToolStripMenuItem
+            // 
+            serifToolStripMenuItem.Name = "serifToolStripMenuItem";
+            serifToolStripMenuItem.Size = new Size(176, 22);
+            serifToolStripMenuItem.Text = "Serif";
+            // 
+            // sansSerifToolStripMenuItem
+            // 
+            sansSerifToolStripMenuItem.Checked = true;
+            sansSerifToolStripMenuItem.CheckState = CheckState.Checked;
+            sansSerifToolStripMenuItem.Name = "sansSerifToolStripMenuItem";
+            sansSerifToolStripMenuItem.Size = new Size(176, 22);
+            sansSerifToolStripMenuItem.Text = "(Default) Sans serif";
+            // 
+            // forceMonospaceToolStripMenuItem
+            // 
+            forceMonospaceToolStripMenuItem.Name = "forceMonospaceToolStripMenuItem";
+            forceMonospaceToolStripMenuItem.Size = new Size(176, 22);
+            forceMonospaceToolStripMenuItem.Text = "(Force) Monospace";
+            // 
             // Opener
             // 
             Opener.DefaultExt = "md";
@@ -210,18 +211,76 @@
             Saver.DefaultExt = "html";
             Saver.Filter = "HTML websites|*.html|All files|*.*";
             // 
+            // groupBox4
+            // 
+            groupBox4.Controls.Add(progressBar1);
+            groupBox4.Controls.Add(chromiumWebBrowser1);
+            groupBox4.Controls.Add(button4);
+            groupBox4.Dock = DockStyle.Fill;
+            groupBox4.Location = new Point(0, 91);
+            groupBox4.Name = "groupBox4";
+            groupBox4.Size = new Size(800, 401);
+            groupBox4.TabIndex = 3;
+            groupBox4.TabStop = false;
+            groupBox4.Text = "Preview";
+            // 
+            // chromiumWebBrowser1
+            // 
+            chromiumWebBrowser1.ActivateBrowserOnCreation = false;
+            chromiumWebBrowser1.Dock = DockStyle.Fill;
+            chromiumWebBrowser1.Location = new Point(3, 42);
+            chromiumWebBrowser1.Name = "chromiumWebBrowser1";
+            chromiumWebBrowser1.Size = new Size(794, 356);
+            chromiumWebBrowser1.TabIndex = 0;
+            chromiumWebBrowser1.LoadingStateChanged += chromiumWebBrowser1_LoadingStateChanged;
+            // 
+            // button4
+            // 
+            button4.Dock = DockStyle.Top;
+            button4.FlatStyle = FlatStyle.System;
+            button4.Location = new Point(3, 19);
+            button4.Name = "button4";
+            button4.Size = new Size(794, 23);
+            button4.TabIndex = 1;
+            button4.Text = "Render preview";
+            button4.UseVisualStyleBackColor = true;
+            // 
+            // progressBar1
+            // 
+            progressBar1.Dock = DockStyle.Top;
+            progressBar1.Location = new Point(3, 42);
+            progressBar1.Name = "progressBar1";
+            progressBar1.Size = new Size(794, 2);
+            progressBar1.Style = ProgressBarStyle.Marquee;
+            progressBar1.TabIndex = 2;
+            // 
+            // button3
+            // 
+            button3.BackColor = Color.Transparent;
+            button3.Dock = DockStyle.Bottom;
+            button3.FlatStyle = FlatStyle.Flat;
+            button3.Location = new Point(0, 469);
+            button3.Name = "button3";
+            button3.Size = new Size(800, 23);
+            button3.TabIndex = 4;
+            button3.Text = "Convert";
+            button3.UseVisualStyleBackColor = false;
+            button3.Click += button3_Click;
+            // 
             // Form1
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
             ClientSize = new Size(800, 492);
+            Controls.Add(button3);
+            Controls.Add(groupBox4);
             Controls.Add(panel1);
             Controls.Add(menuStrip1);
             MainMenuStrip = menuStrip1;
+            MinimumSize = new Size(633, 531);
             Name = "Form1";
             Text = "MintHTML";
-            groupBox1.ResumeLayout(false);
+            Load += Form1_Load;
-            groupBox1.PerformLayout();
             panel1.ResumeLayout(false);
             groupBox3.ResumeLayout(false);
             groupBox3.PerformLayout();
@@ -229,15 +288,12 @@
             groupBox2.PerformLayout();
             menuStrip1.ResumeLayout(false);
             menuStrip1.PerformLayout();
+            groupBox4.ResumeLayout(false);
             ResumeLayout(false);
             PerformLayout();
         }
 
         #endregion
-
-        private GroupBox groupBox1;
-        private RadioButton radioButton2;
-        private RadioButton radioButton1;
         private Panel panel1;
         private MenuStrip menuStrip1;
         private ToolStripMenuItem fileToolStripMenuItem;
@@ -251,5 +307,15 @@
         private TextBox textBox2;
         private OpenFileDialog Opener;
         private SaveFileDialog Saver;
+        private GroupBox groupBox4;
+        private Button button3;
+        private CefSharp.WinForms.ChromiumWebBrowser chromiumWebBrowser1;
+        private Button button4;
+        private ToolStripMenuItem renderToolStripMenuItem;
+        private ToolStripMenuItem fontFamilyToolStripMenuItem;
+        private ToolStripMenuItem serifToolStripMenuItem;
+        private ToolStripMenuItem sansSerifToolStripMenuItem;
+        private ToolStripMenuItem forceMonospaceToolStripMenuItem;
+        private ProgressBar progressBar1;
     }
 }

Form1.cs

@@ -1,3 +1,6 @@
+using CefSharp;
+using CefSharp.WinForms;
+
 namespace MintHTML
 {
     public partial class Form1 : Form
@@ -7,11 +10,6 @@ namespace MintHTML
             InitializeComponent();
         }
 
-        private void radioButton1_CheckedChanged(object sender, EventArgs e)
-        {
-            groupBox2.Enabled = radioButton1.Checked;
-        }
-
         private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
         {
             MessageBox.Show("MintHTML is a simple Markdown converter and renderer made by SweeZero.", "About", MessageBoxButtons.OK);
@@ -27,6 +25,22 @@ namespace MintHTML
         {
             Saver.ShowDialog();
             textBox1.Text = Saver.FileName;
+
+        }
+
+        private void chromiumWebBrowser1_LoadingStateChanged(object sender, CefSharp.LoadingStateChangedEventArgs e)
+        {
+
+        }
+
+        private void Form1_Load(object sender, EventArgs e)
+        {
+            chromiumWebBrowser1.LoadHtml("<style>html{font-family: sans-serif}</style><h1>MintHTML</h1><p>Open a markdown file and press \"Render preview\" to see the output here.</p>");
+        }
+
+        private void button3_Click(object sender, EventArgs e)
+        {
+
         }
     }
 }

Form1.resx

@@ -121,9 +121,12 @@
     <value>17, 17</value>
   </metadata>
   <metadata name="Opener.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>132, 17</value>
+    <value>120, 18</value>
   </metadata>
   <metadata name="Saver.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>271, 17</value>
+    <value>201, 20</value>
+  </metadata>
+  <metadata name="$this.TrayHeight" type="System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>64</value>
   </metadata>
 </root>

MintHTML.csproj

@@ -4,8 +4,13 @@
     <OutputType>WinExe</OutputType>
     <TargetFramework>net6.0-windows7.0</TargetFramework>
     <Nullable>enable</Nullable>
-    <UseWindowsForms>true</UseWindowsForms>
+    <UseWindowsForms>True</UseWindowsForms>
     <ImplicitUsings>enable</ImplicitUsings>
+	<CefSharpAnyCpuSupport>true</CefSharpAnyCpuSupport>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="CefSharp.WinForms.NETCore" Version="124.3.50" />
+  </ItemGroup>
+
 </Project>