How to: Add Windows Forms to Outlook Solutions

This example adds a Windows Form to a Microsoft Office Outlook project and displays the form to the user.

Applies to: The information in this topic applies to application-level projects for Outlook 2007 and Outlook 2010. For more information, see Features Available by Office Application and Project Type.

On the Project menu, click Add Windows Form.
In the Add New Item dialog, select Windows Form. Name the form MainForm and click Add.
Add a button to the form.
Double-click the button to add a Click event handler to the code and open the code view.
Add the following code to the Click event handler of the button.
```
Me.Close()
```
```
this.Close();
```
In Solution Explorer, double-click ThisAddIn.vb (in Visual Basic) or ThisAddIn.cs (in C#) to open the code file. Add the following code to the ThisApplication_StartUp event handler.
```
Dim mainForm As New MainForm()
mainForm.ShowDialog()
```
```
MainForm formMain = new MainForm();
formMain.ShowDialog();
```
Press F5 to build and run the solution.

See Also