ReportViewer

Question

I have 4 forms in my program. On form4 there is a TabControl which on its 4th TabPage I have put a ReportViewer.

There are some TextBoxes and ComboBoxes on form2 and form3.
There is a button called 'showResultButton' on 3rd TabPage on form4. When the user clicks this button I want to show the results on the ReportViewer. This results should contain the texts that the user has previously entered in the TextBoxes of form2 and form3 and the items of ComboBoxes that have previously been chosen.

How can I do this?

Thanks.