populating a textbox

[roninn75]

hi i want to populate a textbox when i select an item from a combobox. the data is read from a textfile, the combobox is populated on load but when i select an item in the combobox i want a textbox to be loaded with the corresponding data. can anyone point me in the right direction please.
here is my code sofar:

private: System::Void cmbBoxStudNo_SelectedIndexChanged(System::Object^  sender, System::EventArgs^  e)
 {
				 int Index = cmbBoxStudNo->SelectedIndex;
				 txtName->Text= (gcnew String(A[Index].GetName()));
			 }