Public partial class Counter : UserControl
To code the user controlĭouble-click the form to open its load event handler in the code window.Ībove the event handler method, in the control class create an integer to store the counter value and a string to store the display text as shown in the following example. The ProvideToolboxControl attribute determines where in the Toolbox the Counter control will appear. The Counter control will expose a method to increment the counter, an event to be raised whenever the counter is incremented, a Reset button, and three properties to store the current count, the display text, and whether to show or hide the Reset button. In the Properties window, set the following values for the controls on the design surface. Resize the overall user control to 150, 50 pixels, and resize the button control to 50, 20 pixels. Remove the Click Here ! button that is included by default when you add the Windows Forms Toolbox Control item template.įrom the Toolbox, drag a Label control and then a Button control below it to the design surface. In Solution Explorer, double-click Counter.cs to open it in the designer. No other child controls are required because callers will increment the counter programmatically. The Counter control requires two child controls: a xref: to display the current count, and a xref: to reset the count to 0. This adds a user control, a ProvideToolboxControlAttribute xref: to place the control in the Toolbox, and a Asset entry in the VSIX manifest for deployment. In the Add New Item dialog, go to Visual C# > Extensibility and select Windows Forms Toolbox Control In the Solution Explorer, right-click the project node and select Add > New Item. When the project opens, add a Windows Forms Toolbox Control item template named Counter. You can find the VSIX project template in the New Project dialog, by searching for "vsix". Create an extension with a Windows Forms Toolbox ControlĬreate a VSIX project named MyWinFormsControl. The Windows Forms Toolbox Control template creates an undefined user control and provides all of the functionality that is required to add the control to the Toolbox. For more information, see Install the Visual Studio SDK. You can also install the VS SDK later on. It is included as an optional feature in Visual Studio setup. Starting in Visual Studio 2015, you do not install the Visual Studio SDK from the download center. This walkthrough shows how to use the template to create a simple counter control that you can distribute to other users. The Windows Forms Toolbox Control item template that is included in the Visual Studio Extensibility Tools (VS SDK), lets you create a Toolbox control that is automatically added when the extension is installed.
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