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I am writing a Chinese GUI program using Visual Studio.

I have already tested this character on Visual Studio 2008 and 2017.

This problem happen in both version.

The character I was using is 戶 (u6236).

The Font size become smaller when it is in the Form like Label, TextBox, Button text.

However, the character's size does not change in the Title Bar, Status Bar or Menu bar.

Can someone explain why this happen?

Cannot post image yet so I put down a link here.

As you can see, only this character become smaller.

partial class Form1

 private void InitializeComponent()
 
 this.components = new System.ComponentModel.Container();
 this.button1 = new System.Windows.Forms.Button();
 this.checkBox1 = new System.Windows.Forms.CheckBox();
 this.label1 = new System.Windows.Forms.Label();
 this.listView1 = new System.Windows.Forms.ListView();
 this.columnHeader1 = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
 this.textBox1 = new System.Windows.Forms.TextBox();
 this.toolTip1 = new System.Windows.Forms.ToolTip(this.components);
 this.toolTip2 = new System.Windows.Forms.ToolTip(this.components);
 this.toolStrip1 = new System.Windows.Forms.ToolStrip();
 this.toolStripLabel1 = new System.Windows.Forms.ToolStripLabel();
 this.statusStrip1 = new System.Windows.Forms.StatusStrip();
 this.toolStripStatusLabel1 = new System.Windows.Forms.ToolStripStatusLabel();
 this.toolStrip1.SuspendLayout();
 this.statusStrip1.SuspendLayout();
 this.SuspendLayout();
 // 
 // button1
 // 
 this.button1.Location = new System.Drawing.Point(7, 131);
 this.button1.Name = "button1";
 this.button1.Size = new System.Drawing.Size(75, 23);
 this.button1.TabIndex = 0;
 this.button1.Text = "住戶";
 this.button1.UseVisualStyleBackColor = true;
 // 
 // checkBox1
 // 
 this.checkBox1.AutoSize = true;
 this.checkBox1.Location = new System.Drawing.Point(7, 160);
 this.checkBox1.Name = "checkBox1";
 this.checkBox1.Size = new System.Drawing.Size(47, 17);
 this.checkBox1.TabIndex = 1;
 this.checkBox1.Text = "住戶";
 this.checkBox1.UseVisualStyleBackColor = true;
 // 
 // label1
 // 
 this.label1.AutoSize = true;
 this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.5F);
 this.label1.Location = new System.Drawing.Point(4, 180);
 this.label1.Name = "label1";
 this.label1.Size = new System.Drawing.Size(28, 15);
 this.label1.TabIndex = 2;
 this.label1.Text = "住戶";
 // 
 // listView1
 // 
 this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader 
 this.columnHeader1);
 this.listView1.Location = new System.Drawing.Point(7, 28);
 this.listView1.Name = "listView1";
 this.listView1.Size = new System.Drawing.Size(121, 97);
 this.listView1.TabIndex = 3;
 this.listView1.UseCompatibleStateImageBehavior = false;
 this.listView1.View = System.Windows.Forms.View.Details;
 // 
 // columnHeader1
 // 
 this.columnHeader1.Text = "住戶";
 // 
 // textBox1
 // 
 this.textBox1.Location = new System.Drawing.Point(7, 198);
 this.textBox1.Name = "textBox1";
 this.textBox1.Size = new System.Drawing.Size(100, 20);
 this.textBox1.TabIndex = 4;
 this.textBox1.Text = "住戶";
 // 
 // toolStrip1
 // 
 this.toolStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem 
 this.toolStripLabel1);
 this.toolStrip1.Location = new System.Drawing.Point(0, 0);
 this.toolStrip1.Name = "toolStrip1";
 this.toolStrip1.Size = new System.Drawing.Size(800, 25);
 this.toolStrip1.TabIndex = 5;
 this.toolStrip1.Text = "toolStrip1";
 // 
 // toolStripLabel1
 // 
 this.toolStripLabel1.Name = "toolStripLabel1";
 this.toolStripLabel1.Size = new System.Drawing.Size(32, 22);
 this.toolStripLabel1.Text = "住戶";
 // 
 // statusStrip1
 // 
 this.statusStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem 
 this.toolStripStatusLabel1);
 this.statusStrip1.Location = new System.Drawing.Point(0, 428);
 this.statusStrip1.Name = "statusStrip1";
 this.statusStrip1.Size = new System.Drawing.Size(800, 22);
 this.statusStrip1.TabIndex = 6;
 this.statusStrip1.Text = "statusStrip1";
 // 
 // toolStripStatusLabel1
 // 
 this.toolStripStatusLabel1.Name = "toolStripStatusLabel1";
 this.toolStripStatusLabel1.Size = new System.Drawing.Size(32, 17);
 this.toolStripStatusLabel1.Text = "住戶";
 // 
 // Form1
 // 
 this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
 this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
 this.ClientSize = new System.Drawing.Size(800, 450);
 this.Controls.Add(this.statusStrip1);
 this.Controls.Add(this.toolStrip1);
 this.Controls.Add(this.textBox1);
 this.Controls.Add(this.listView1);
 this.Controls.Add(this.label1);
 this.Controls.Add(this.checkBox1);
 this.Controls.Add(this.button1);
 this.Name = "Form1";
 this.Text = "住戶";
 this.toolStrip1.ResumeLayout(false);
 this.toolStrip1.PerformLayout();
 this.statusStrip1.ResumeLayout(false);
 this.statusStrip1.PerformLayout();
 this.ResumeLayout(false);
 this.PerformLayout();
 

 private System.Windows.Forms.Button button1;
 private System.Windows.Forms.CheckBox checkBox1;
 private System.Windows.Forms.Label label1;
 private System.Windows.Forms.ListView listView1;
 private System.Windows.Forms.ColumnHeader columnHeader1;
 private System.Windows.Forms.TextBox textBox1;
 private System.Windows.Forms.ToolTip toolTip1;
 private System.Windows.Forms.ToolTip toolTip2;
 private System.Windows.Forms.ToolStrip toolStrip1;
 private System.Windows.Forms.ToolStripLabel toolStripLabel1;
 private System.Windows.Forms.StatusStrip statusStrip1;
 private System.Windows.Forms.ToolStripStatusLabel toolStripStatusLabel1;

I believe the issue you are having is to do with the auto scaling that windows performs to ensure correct scale on different screen sizes.

Have a read of Automatic scaling in Windows Forms

It maybe relevant to what your experiencing.