VBA code for data retrieval and modification.

Hello all, what I am looking for is I have a Userform and should search a database depending upon the value in one of the combobox. This search should be necessarily happen through ID nos generated through column A and proceed for the respective cell values in the subsequent columns. Now whatever cell values are found should reflect in the Textboxes on Userform and if necessary user can modify the values and after clicking on modify button the data should go back to the respective cells.

If required I can upload the file or code for ready reference.