UFT Pro (LeanFT) .NET SDK Reference, Version 14.03
Set Method (IToggleButton)
Example 
The value to be assigned to this toggle button. Possible values: HP.LFT.SDK.CheckedState.
Sets the value of this toggle button.
Syntax
void Set( 
   CheckedState state
)

Parameters

state
The value to be assigned to this toggle button. Possible values: HP.LFT.SDK.CheckedState.
Example
// The following code example changes the state of the toggle button. 

[Test]
public void TestWpfToggleButton()
{
    // Identify the application and assign it to an IWindow object. 
    var appMainWindow = Desktop.Describe<IWindow>(new WindowDescription
    {
        ObjectName = @"MainWindow",
        FullType = @"window",
        WindowTitleRegExp = @"MainWindow"
    });

    // Identify the WPF toggle button. 
    var buttonWithToggleButtonSupport = appMainWindow.Describe<IButton>(new ButtonDescription
    {
        Text = @"Toggle Button",
        ObjectName = @"Button4"
    });
    IToggleButton toggleButton = buttonWithToggleButtonSupport.ToggleButton;
    
    // Sets the toggle button's state to checked.
    toggleButton.Set(CheckedState.Checked); 

    // Changes the toggle button state.
    if (toggleButton.IsChecked)
    {
        toggleButton.Set(CheckedState.Unchecked);
    }
    else
    {
        toggleButton.Set(CheckedState.Checked);
    }
}