title: Custom button in C#: How to remove hover background?
body: <p>I'm trying to do a custom button to my form (which has FormBorderStyle = none) using Visual Studio 2005. I have my 3 states button images in an ImageList linked to the button.</p>
  
  <pre><code>this.btnClose.AutoSize = false;
  this.btnClose.BackColor = System.Drawing.Color.Transparent;
  this.btnClose.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
  this.btnClose.FlatAppearance.BorderSize = 0;
  this.btnClose.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
  this.btnClose.ForeColor = System.Drawing.Color.Transparent;
  this.btnClose.ImageKey = "Disabled";
  this.btnClose.ImageList = this.imageList1;
  this.btnClose.Location = new System.Drawing.Point(368, -5);
  this.btnClose.Margin = new System.Windows.Forms.Padding(0);
  this.btnClose.Name = "btnClose";
  this.btnClose.Size = new System.Drawing.Size(31, 31);
  this.btnClose.TabIndex = 0;
  this.btnClose.UseVisualStyleBackColor = false;
  this.btnClose.MouseLeave += new System.EventHandler(this.btnClose_MouseLeave);
  this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
  this.btnClose.MouseDown += new System.Windows.Forms.MouseEventHandler(this.btnClose_MouseDown);
  this.btnClose.MouseHover += new System.EventHandler(this.btnClose_MouseHover);
  
  private void btnClose_MouseHover(object sender, EventArgs e)
  {
      btnClose.ImageKey = "enabled";
  }
  
  private void btnClose_MouseDown(object sender, MouseEventArgs e)
  {
      btnClose.ImageKey = "down";
  }
  
  private void btnClose_MouseLeave(object sender, EventArgs e)
  {
      btnClose.ImageKey = "disabled";
  }
  </code></pre>
  
  <p>All is working, but there's one catch. Whenever I move the mouse hover the button I get a really annoying grey background.</p>
  
  <p>How can I remove that?</p>