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Clicking the "Contrast Background" color switches the background color to a contrasting color:
RadControls for Winforms
RadControls for Winforms
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Working With ToggleState - On/Off/Indeterminate
1. Create a common event handler for both the "Horizontal Flip" and "Vertical Flip" checkboxes. If both 
checkboxes are on or off, the "Flip" check box toggle state is set to match. If one checkbox is On and 
another Off, the set the "Flip" check box toggle state to Indeterminate.
[VB] Handling the Horizontal and Vertical "Flip" Button ToggleStateChanged Events
Private Sub HorizVert_ToggleStateChanged(ByVal sender As ObjectByVal args As
' true if both checkboxes are off
Dim bothOff As Boolean = (cbHorizontalFlip.ToggleState = ToggleState.Off) AndAlso
(cbVerticalFlip.ToggleState = ToggleState.Off)
' true if both checkboxes are on
Dim bothOn As Boolean = (cbHorizontalFlip.ToggleState = ToggleState.[On]) AndAlso
(cbVerticalFlip.ToggleState = ToggleState.[On])
If bothOn Then
cbFlip.ToggleState = ToggleState.[On]
ElseIf bothOff Then
cbFlip.ToggleState = ToggleState.Off
cbFlip.ToggleState = ToggleState.Indeterminate
End If
End Sub
RadControls for Winforms
RadControls for Winforms
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2. Add a "Flip" checkbox ToggleStateChanged event handler to make the horizontal and vertical check box 
toggle states agree with the "Flip" checkbox.
This handler simply assigns the toggle state of the "Flip" checkbox to both the horizontal and vertical check 
box toggle states. To avoid unexpected behaviors here, unhook the ToggleStateChanged event handlers for 
the horizontal and vertical check boxes, make the assignments, then rehook the event handlers.
[C#] Handling the Horizontal and Vertical "Flip" Button ToggleStateChanged Events
private void HorizVert_ToggleStateChanged(object sender, StateChangedEventArgs args)
// true if both checkboxes are off
bool bothOff = (cbHorizontalFlip.ToggleState == ToggleState.Off) &&
(cbVerticalFlip.ToggleState == ToggleState.Off);
// true if both checkboxes are on
bool bothOn = (cbHorizontalFlip.ToggleState == ToggleState.On) &&
(cbVerticalFlip.ToggleState == ToggleState.On);
if (bothOn)
cbFlip.ToggleState = ToggleState.On;
else if (bothOff)
cbFlip.ToggleState = ToggleState.Off;
cbFlip.ToggleState = ToggleState.Indeterminate;
[VB] Handling the "Flip" Check Box ToggleStateChanged Event
Private Sub cbFlip_ToggleStateChanged(ByVal sender As ObjectByVal args As
If args.ToggleState <> ToggleState.Indeterminate Then
' unhook event handler temporarily
cbHorizontalFlip.ToggleStateChanged -= HorizVert_ToggleStateChanged
cbVerticalFlip.ToggleStateChanged -= HorizVert_ToggleStateChanged
cbHorizontalFlip.ToggleState = args.ToggleState
cbVerticalFlip.ToggleState = args.ToggleState
' re-hook event handler
cbHorizontalFlip.ToggleStateChanged += HorizVert_ToggleStateChanged
cbVerticalFlip.ToggleStateChanged += HorizVert_ToggleStateChanged
End If
End Sub
[C#] Handling the "Flip" Check Box ToggleStateChanged Event
private void cbFlip_ToggleStateChanged(object sender, StateChangedEventArgs args)
if (args.ToggleState != ToggleState.Indeterminate)
// unhook event handler temporarily
cbHorizontalFlip.ToggleStateChanged -= HorizVert_ToggleStateChanged;
cbVerticalFlip.ToggleStateChanged -= HorizVert_ToggleStateChanged;
cbHorizontalFlip.ToggleState = args.ToggleState;
cbVerticalFlip.ToggleState = args.ToggleState;
// re-hook event handler
cbHorizontalFlip.ToggleStateChanged += HorizVert_ToggleStateChanged;
cbVerticalFlip.ToggleStateChanged += HorizVert_ToggleStateChanged;
RadControls for Winforms
RadControls for Winforms
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3. Handle the click event for the "Rotate" RadRepeatButton. As the button is held down by the user, this 
event fires continually, once a second. The image is rotated and fliped each time based on the check box 
4. Press Ctl-F5 to run the application. Try all the combinations of the check boxes to see how that changes 
the look and behavior.
The "Desert" theme has a good representation of the Indeterminate state for the RadCheckBox 
[VB] Handling the Click Event for the "Rotate" Button
Private Sub RotateClick(ByVal sender As ObjectByVal e As EventArgs)
If cbFlip.ToggleState = ToggleState.[On] Then
ElseIf cbHorizontalFlip.ToggleState = ToggleState.[On] Then
ElseIf cbVerticalFlip.ToggleState = ToggleState.[On] Then
End If
End Sub
[C#] Handling the Click Event for the "Rotate" Button
private void RotateClick(object sender, EventArgs e)
if (cbFlip.ToggleState == ToggleState.On)
else if (cbHorizontalFlip.ToggleState == ToggleState.On)
else if (cbVerticalFlip.ToggleState == ToggleState.On)
RadControls for Winforms
RadControls for Winforms
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The "Flip" button On state is checked and has a slight highlight to the border. The Off state is un-checked 
and un-highlighted. The Indeterminate state is checked but un-highlighted.
In this chapter you took a tour of the various types of buttons available in the RadControls for Winforms suite. 
3.6  Summary
RadControls for Winforms
RadControls for Winforms
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You learned the basic characteristics, behavior and important properties of each button type. You used several 
design time interfaces to configure the buttons. You worked with the Items collections of both 
RadDropDownButton and RadSplitButton. You responded to events both from the buttons and from individual 
Items collection members. Finally, you learned how to manipulate button ToggleState and how to handle 
ToggleState related events.
RadControls for Winforms
RadControls for Winforms
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Learn usage and basic characteristics for each type of editor. 
Learn how to retrieve user information from RadTextBox, RadMaskedEditBox, RadSpinEditor, 
RadDateTimePicker, and RadColorDialog controls. 
Learn how to use edit masks and formats. 
Learn how to set tool tips. 
Learn how to validate input and different strategies for responding to incorrect data. 
RadControls for Winforms edit controls are highly customizable, themable, intelligent components for 
controlled data input in Windows Forms applications. They include...
RadTextBox:  A themeable alternative to the standard TextBox control with enhanced properties such as 
NullText to hold prompt messages when there is no entry. 
RadMaskedEdit: Adds input validation and masks, such as date, IP Address, SSN, phone number, digits, and 
decimals. This control is also themable and has a NullText property. 
RadDateTimePicker: Allows the user to enter dates directly or using a drop-down calendar. You can 
control the date format, set minimum and maximum dates, set the calendar to display for a specific 
culture and display a prompt when the control has a "null date". 
RadSpinEditor: A numeric entry control that allows direct input, keyboard control or the user may click on 
the up-down arrows. You can control the minimum and maximum value and the increment amount. You 
can also tailor formatting details such as the thousands separator and decimal places. 
RadColorDialog: A color dialog replacement with lots of bells and whistles including four different view 
tabs, Basic, Professional, Web and System, hex value entry, eye dropper control and custom colors.
4.1  Objectives
4.2  Introduction
RadControls for Winforms
RadControls for Winforms
In this project we create a no-frills checkout form using all editors. In later projects we will extend the 
example to set date time picker selections in code, assign tool tips and validate input.
Preparing the Project
4.3  Getting Started
RadControls for Winforms
RadControls for Winforms
1. Create a new Windows Forms application. 
2. In the Solution Explorer, delete the default form. 
3. Also in the Solution Explorer, right-click the project and select Add | New Item... from the context menu. 
4. Select the "Telerik RadForm" template and click the Add button to close the dialog. 
Adding Edit Controls to the RadForm
1. Drag an Office2007SilverTheme control to the RadForm. This step will add the theme control to the 
component tray below the form designer. 
2. In the Properties window set the RadForm Properties: 
Size = 630, 350 
MinimumSize = 630, 350 
Text = "Checkout" 
ThemeName = "Office2007Silver" 
3. Drop three standard GroupBox controls and a RadButton on the form. Arrange them to have roughly the 
same proportions as the example below:
4. Set the control properties as follows: 
The top group box: Name = "gbShipTo", Anchor = Top, Left, Right, BackColor = Transparent, TabIndex
= 0, Text = "Ship to". 
The bottom left group box: Name = "gbDelivery", Anchor = Top, Bottom, Left, BackColor = 
Transparent, TabIndex = 1, Text = "Deliver By". 
You can find the complete source for this project at:
\VS Projects\Editors\<VB|CS>\GettingStarted
RadControls for Winforms
RadControls for Winforms
The bottom right group box: Name = "gbGiftOptions", Anchor = Top, Bottom, Left, Right, BackColor = 
r = 
Transparent, TabIndex = 2, Text = "Gift Options". 
The RadButton: Name = "btnPlaceOrder", Anchor = Bottom, Right, TabIndex = 3, Text = "Place Order", 
Tag = "Place Order". 
5. Add the following controls to the "gbShipTo" group box: 
1. RadLabel: Text = "Name:". 
2. RadTextBox: Name = tbName, Anchor = Left, Right", NullText = "<Enter Name>", Tag = "Name", 
TabIndex = 0. 
3. RadLabel: Text = "Address:". 
4. RadTextBox: Name = tbAddress, Anchor = Left, Right", NullText = "<Enter Address>", Tag = "Address", 
TabIndex = 1. 
5. RadLabel: Text = "City:". 
6. RadTextBox: Name = tbCity, NullText = "<Enter City>", Tag = "City", TabIndex = 2. 
7. RadLabel: Text = "State:". 
8. RadMaskedEditBox: Name = meState, MaskType = Standard, Mask = "LL", Tag = "State", TabIndex = 3. 
9. RadLabel: Text = "Zip:". 
10. RadMaskedEditBox: Name = meZip, MaskType = Standard, Mask = "99999-9999", Tag = "Zip", TabIndex
= 4.
6. Add the following controls to the "gbDelivery" group box: 
1. RadLabel: Text = "Business Days". 
2. RadTextBox: Name = seDeliver, CausesValidation = False, Tag = "Business Days", TabIndex = 0. 
3. RadLabel: Text = "or...". 
4. RadLabel: Text = "Deliver by:". 
5. RadDateTimePicker: Name = "dtDeliver", Tag = "Deliver by", TabIndex = 1
7. Add the following controls to the "gbGiftOptions" group box: 
RadControls for Winforms
RadControls for Winforms
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