how to bind two data sources for same user control combo box used in diffirent windows forms

I'm kind of confused. Have you made one form and are calling it twice and want to show different data in each call.

Code
{
Form1 frm = new Form1();

frm.ChangeDataSource(firstDataSource);
frm.Show(); // show first set of data
frm.ChangeDataSource(newDataSource); // change the data source
frm.Show(); // show second set of data
}

Or have you made two forms, which you call once each and you want to show different data in different forms.

Code
{
Form1 frm1 = new Form1();
Form2 frm2 = new Form2();

frm1.Show(); // show first set of data
frm2.Show(); // show second set of data
}