How open form in read only mode

Open the form in Design view
Double-click the form selector
In the AllowEdits property box, click No.
In the AllowDeletions property box, click No.
In the AllowAdditions property box, click No.
That should do it.

 

Or you can set them in code. After opening your form, do this:

with Forms("frmCardJobs")
  .AllowAdditions=False
  .AllowEdits=False
  .AllowDeletions= False
End With

Or you could use the code for the on_load property Open property
Form.AllowAdditions = False

I don't think any of the recommendations so far will work.. Remember, I have just one form which when opened with button #1, allows for editing.  When the user clicks button #1, the same form has to open in read-only mode,

So who edits it then if it's not a user?
 

You could add another button and hide it. Or put a tiny button somewhere discreet on the form (make it transparent) and when clicked code the button that to show in edit mode, enter a password that you can set. Probably a better way to do this but I don't know if the users can get to the code, if not, then a password to edit mode would do.

The ability to get to the editable form is via a password form.  The read-only version has to be opened without going through a password form.

<When the user clicks button #1, the same form has to open in read-only mode,>

The suggestions we've made will result in a readonly form, assuming the form is not already opened. If it is, then my suggestion should work to set the form's properties dynamically ...

For the command button you are clicking to open the form in read-only mode use the following code
DoCmd.OpenForm stDocName, , , stLinkCriteria, acFormReadOnly

"I have just one form which when opened with button #1, allows for editing.  When the user clicks button #1, the same form has to open in read-only mode".
I gave a solution to add a password form after giving a solution to make a form read-only!
"The ability to get to the editable form is via a password form.  The read-only version has to be opened without going through a password form."
Well I'd say any of the solutions provied will do what you want it to. Maybe have 2 buttons one saying "administrator settings" and one saying "Read data"?
You can't do things with one control unless it's triggered by an event, so you either have to have 2 buttons or 2 forms. There's no alternative.
Hope that helps a bit