Username directly shown in InfoPath form

When you create an InfoPath form, which you for example are going to use in a SharePoint site, you want to automatically fill in the name of the user. This is not very in infoPath:

1. Create an InfoPath form and drag a textbox control on the design surface

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2. Go to the properties of the textbox, by double or right clicking on it. Once you have the properties dialog box open,you can opt to fill in a default value. We going to use a function to fill in the value.

Click on the button next to the default value textbox and insert a new function.

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3. Now search for the userName function, it's the last one if you search in the All category:

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Close the properties and open your form, you will see that the name is automatically filled in now.