Making a Textbox in XNA is useful when you want to display text to the user in your game. XNA is a development environment created by Microsoft for coding computer games. The text in a Textbox appears left to right, similar to how characters appears in a text editor when you type. To create a Textbox, you need a textured image file that you can use as a background for the Textbox.
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Open the XNA Framework and load your Windows Game project.
Open the "Game1.cs" file.
Declare "Rectangle" and "Texture2D" objects at the top of the "Game1.cs" file, right after the "GraphicsDeviceManager graphics; SpriteBatch sprite Batch;" lines. For example, "Rectangle my_textbox; Texture2D myColor;".
Set your textbox's initial width, height and position in the "Initialize()" method. For example, "my_textbox = new Rectangle(20, 20, 100, 100);" makes a textbox with a size of 100 by 100 and positioned at the coordinates (20,20).
Load a textured image to your project by switching over to Visual C#, opening the Solution Explorer, right-clicking "Content" and clicking "Add -> Existing Item". Select your image file.
Load the texture background for the textbox using the "Content.Load" function in the "LoadContent()" method. For example, "myColor = Content.Load<Texture2D>("color_description");".
Draw the textbox by using the sprite Batch object's "Begin", "Draw" and "End" functions in the "Draw()" method, before "base.Draw(gameTime);" and after "TODO". For example, "spriteBatch.Begin(); spriteBatch.Draw(myColor, my_textbox, Color.Black); spriteBatch.End();". Your textbox should now automatically display once you run your program.
Save your Windows Game Project.
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