Create custom form controls in C#.Net

• Custom got focus color
• Custom Lost focus color
• New Methods

1. Add New  Windows Forms Control Library project in Visual Studio .Net 2012/15.
2. Drag a Text Box to the user control
3. Rename the User control as “CPTextBox” where CP stands for Code Poet.
   

   Windows Forms Control Library Project

namespace CodePoetControls
{

public partial class CPTextBox: UserControl
{
Color Ecolor;
Color Lcolor;

public CPTextBox()
{
InitializeComponent();
textBox1.BackColor = Color.White;

}

private void textBox1_Enter(object sender, EventArgs e)
{
textBox1.BackColor = Ecolor;
}
private void textBox1_Leave(object sender, EventArgs e)
{
textBox1.BackColor = Lcolor;
}

public string GetText()
{
return (textBox1.Text);
}

[Browsable(true)]
[Category(“Extented Properties”)]
[Description(“Get input Text”)]
[DisplayName(“BoxText”)]
public string BoxText
{
set
{

textBox1.Text = value.ToUpper().Trim();

}
get
{
return (textBox1.Text  );
}
}
[Browsable(true) ]
[Category(“Extented Properties”)]
[Description (“Set Focus Color”)]
[DisplayName(“Enter Color”)]
public Color  EnterColor
{
set
{
Ecolor  = value ;
base.OnEnter(new EventArgs() );
}
get
{
return (Ecolor );

}
}

[Browsable(true)]
[Category(“Extented Properties”)]
[Description(“Set Lost Focus Color”)]
[DisplayName(“Leave Color”)]
public Color LeaveColor
{
set
{
Lcolor  = value;

}
get
{
return (Lcolor );
}
}

}
}

Distributing and using the control

Distributing and using the Dll file. For working with the new control you only need the compiled Dll not the custom project. You can add it by

• Right click Tool Box – Choose Items

• Brow the Dll of your custom control

• Enable the control and it will be available on your control box.