VB.Net, Create a Custom Control (not a User Control, AFAIK)

JimH
#1 / 5

Create a Custom Control (not a User Control, AFAIK)

I am wanting to inherit from the standard Button and
override the background color property; assigning the
new Button the name MyButton, as below:

------------------------------------------------------
Imports System.WinForms

Public Class MyButton : System.WinForms.Button
Me.BackColor = Color.LightGray
End Class
------------------------------------------------------

I get the error:

Expected variable, constant, Enum, Type, or procedural
declaration.

under 'system'.

Can anyone show a 'tested' and 'proven' means, in VB,
to simply inherit from a standard control and override a
default property such as background color. This should
be simple, but I have been unable to find a sample in
the SDK's.

MyButton needs to also appear, and be persistent, on the
ToolBox.

Thanks,

Jim Holloman

Mon, 16 Jun 2003 07:56:27 GMT

Patrick Steel
#2 / 5

Create a Custom Control (not a User Control, AFAIK)

Quote:

> I am wanting to inherit from the standard Button and
> override the background color property; assigning the
> new Button the name MyButton, as below:

> ------------------------------------------------------
> Imports System.WinForms

> Public Class MyButton : System.WinForms.Button
> Me.BackColor = Color.LightGray
> End Class
> ------------------------------------------------------

You need the keyword "Inherits",

Public Class MyButton : Inherits System.WinForms.Button

Or more commonly,

Public Class MyButton
Inherits System.WinForms.Button

--
Patrick Steele

Microsoft MCP

Mon, 16 Jun 2003 05:05:27 GMT

J W Coope
#3 / 5

Create a Custom Control (not a User Control, AFAIK)

This will work. The easiest way is to
1. create a user control
2. edit the code to have it inherit from Button instead of usercontrol
3. compile, and the MyButton will be available on the toolbox and
usable from the IDE designer,
------------------------------------------------------
Imports System.WinForms

Public Class MyButton
Inherits System.WinForms.Button
Me.BackColor = Color.LightGray
End Class
------------------------------------------------------

Mon, 16 Jun 2003 06:19:53 GMT

JimH
#4 / 5

Create a Custom Control (not a User Control, AFAIK)

I am wanting to inherit from the standard Button and
override the background color property; assigning the
new Button the name MyButton, as below:

------------------------------------------------------
Imports System.WinForms

Public Class MyButton : System.WinForms.Button
Me.BackColor = Color.LightGray
End Class
------------------------------------------------------

I get the error:

Expected variable, constant, Enum, Type, or procedural
declaration.

under 'system'.

Can anyone show a 'tested' and 'proven' means, in VB,
to simply inherit from a standard control and override a
default property such as background color. This should
be simple, but I have been unable to find a sample in
the SDK's.

MyButton needs to also appear, and be persistent, on the
ToolBox.

Thanks,

Jim Holloman

Mon, 16 Jun 2003 08:36:17 GMT

Jim Holloma
#5 / 5

Create a Custom Control (not a User Control, AFAIK)

Thanks, J. W. I like your approach of letting the
IDE generate the skeleton code.

I apparently managed to create the desired control,
but have been unable to get it to appear on the
toolbox. Please see my followup post of 12-27-2K,
5:45a under "Creating Custom Controls...".

Quote:

> This will work. The easiest way is to
> 1. create a user control
> 2. edit the code to have it inherit from Button instead of usercontrol
> 3. compile, and the MyButton will be available on the toolbox and
> usable from the IDE designer,
> ------------------------------------------------------
> Imports System.WinForms

> Public Class MyButton
> Inherits System.WinForms.Button
> Me.BackColor = Color.LightGray
> End Class
> ------------------------------------------------------

Mon, 16 Jun 2003 21:47:28 GMT