Hi,
1. Go the properties of second field (in which you want to place the data base value).
2. Click on fx button. Click on ‘Insert a field or Group’. Select the data base field.
3. Click on Filter data and click Add button.
4. Select the special field in data base in the first drop down, select is eual to in the second drop down and the field in the form in the third drop down.
5. Click ok until all windows gets closed.
Note: Before doing all these you should take a receive data connection to the data base.