Subform control validation

[Xarkath]

Hello,

I have a form that incorporates 2 subforms. I have all but 1 thing working as intended. I have setup a button to submit the entries (and handle a few other control functions) but I need to validate a single control within the first of the 2 subforms. This should be simple but it seems I am missing something. I just need to check for null or blank and if true open a message box to explain that it is a required field and to then exit the sub without any further execution. My problem is that no matter how I type the code I cannot get it to recognize the control (which is a combo box). Even identifying the from the control is on does not seem to help.

Can anyone send me an idea or two as to what I am missing? I am assuming that this validation is possible to do.

Thanks

[Xarkath]

Never mind. Dumb error. I had it as Me.NavD.AuditType but it needed to be Me!NavD!AuditType. Exclamation marks verses periods.