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From: MUMBAIKADON007
Message 6 in Discussion
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Building Controls
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Building Controls
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Message 1 in Discussion
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MUMBAIKADON007
Building Controls What is the difference between a composite
control and a custom control?
Answer
You combine existing controls to create composite controls. Create composite
controls when you need complex functionality that requires the use of more than
one control.
If you do not want to combine or extend existing controls, you have the option
of creating your own custom controls. Custom controls display user interface
(UI) elements by making calls to a GDI+ Graphics object in the OnPaint event.
Custom controls are generally derived from the base class
System.Windows.Forms.Control.
How do you test a control?
Answer
1) Create a new form in the same project.
2) Add the control to the Toolbox.
3) Add the control to the form from the Toolbox.
What are property attributes?
Answer
Attributes are the glue that binds design-time functionality to a component.
Property attributes allow you to specify the behavior of properties at design
time. Property attributes allow you to specify grouping options for custom
properties in the Properties window of the Visual Studio .NET environment,
default values for properties, and custom editors for custom properties.
List some property attributes built into Visual Studio .NET.
Answer
Browsable
Category
Description
DefaultProperty
DefaultValue
TypeConverter
Editor
RefreshProperties
What are extenders?
Answer
Extender providers add properties to other controls. An example of an extender
is the ToolTip control. The ToolTip property is not available to controls on a
form until you add the ToolTip control to the form.
What is the purpose of LicenseManager and LicenseProvider in licensing
controls?
Answer
The LicenseManager class is responsible for validating licensed controls at
both run time and design time.
The LicenseProvider class is the place to put custom validation code.
Saurabh Rajderkar.
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