You need to expose those Controls ( ComboBox,TextBox etc) inside your user control as Public properties so that you can access these control just like the other properties of the UserControl.
eg:
class MyUserControl :UserControl
{
public TextBox MyTextBox
{
get {return textBox1;}
}
public ComboBox MyComboBox
{
get { return comboBox1;}
}
}
foreach(Control ctrl in panel1.Controls)
{
if(ctrl is MyUserControl)
{
MyUserControl myCtrl = ctrl as MyUserControl;
}
}
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