Check out example codes for "windows forms iterate through all controls". It will help you in understanding the concepts better.
Code Example 1
private void LoopThroughControls(Control parent)
{
foreach (Control c in parent.Controls)
{
if (c.GetType() == typeof(YourType)) {
//Do stuff
} else {
LoopThroughControls(c);
}
}
}
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