There must be a bug if the screen keyboard doesn't come up. The harder way is detailed in the attached project called CustomRecipeDialog.zip. You can take a look at that. In the project you can modify where the window shows up as well.
You need to follow the following procedure before opening the application:
1. Create a panel application, import the System.Windows.Forms.TextBox
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2. Close the application
3. Open the CustomRecipeDialog application and build/run.