Changing value of another form field

[BobJones]

OK heres the deal... I have a property form for keeping track of houses and buildings owned and then on that form i have a policy field for the policy number of the insurance called txtPolicy. Next to that field I have a little button which opens a form so it will show all the insurance policies associated with the housing group which the property is in. When i select the appropriate policy and double click it in the listbox I want it to close the form and set the value of the txtPolicy to the one just selected in the listbox. I know how to get the value of the item selected in the listbox but I just don't know how to set the value of a field on another form... Any ideas or help would be great! cheers

 

[BobJones]

Ok all sorted now.