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C#.Net Newbie Question - Subclassing A Button
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General information
Forum:
ASP.NET
Category:
Class design
Miscellaneous
Thread ID:
01017131
Message ID:
01017303
Views:
27
Hi Kevin,

Go into Visual Studio, right click on the project and select properties. Look in Common Properties, General and you will see "Output Type" - just change it to "Class Library" and then re-compile. This will give you a DLL.

HTH.



>How do I create a DLL?
>
>>Hi Kevin,
>>
>>An .EXE. will require a Main() method. You will want to store your class as a DLL.
>>
>>>Bonnie,
>>>
>>>I created a class and pasted in the code. I tried to compil it and
>>>got an error:
>>>
>>>Program '...MCMControls.exe' does not have an entry point defined
>>>
>>>What am I doing wrong?
>>>
>>>Thanks
>>>
>>>
>>>
>>>>Kevin,
>>>>
>>>>You can't do it visually, but you can still put these kinds of sub-classes in your ToolBox in order to drag them onto your form.
>>>>
>>>>Basically, you'll want a class library that contains your sub-classed UI controls, like textbox, button, etc. Something like this:
>>>>
>>>>using System;
>>>>using System.Drawing;
>>>>using System.Collections;
>>>>using System.ComponentModel;
>>>>using System.Windows.Forms;
>>>>using System.Data;
>>>>
>>>>namespace MyCompany.WinUI.MyClasses
>>>>{
>>>>	public class MyComboBox : System.Windows.Forms.ComboBox
>>>>	{
>>>>		// code here
>>>>	}
>>>>
>>>>	public class MyTextBox : System.Windows.Forms.TextBox
>>>>	{
>>>>		// code here
>>>>	}
>>>>
>>>>	public class MyButton : System.Windows.Forms.Button
>>>>	{
>>>>		// code here
>>>>	}
>>>>}
>>>>
>>>>That's it. These controls can't be sub-classed visually, but as you can see, it's easy enough to do it in code. I have all the basic controls sub-classed in one class library file. Once they're added to the ToolBox, then can be dragged onto any design surface in the IDE.
>>>>
>>>>To add to the ToolBox, do the following: When you have the IDE open in the designer view (not the code view), go to the ToolBox, right-click anywhere and choose the Add/Remove Items, click on Browse and find the .DLL where your sub-classed controls are (you obviously needed to have compiled the class library after you created it). That's it ... they'll then be added to your ToolBox.
>>>>
>>>>~~Bonnie
>>>>
>>>>
>>>>
>>>>>How do I subclass a command button in C#.Net?
>>>>>
>>>>>I'd like to do it visually, so I can then drag my class onto
>>>>>a form.
>>>>>
>>>>>Thanks
-=Gary
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