Detect if there is a specific choice selected in a combo box

Hi.

How do I detect through vba that a specific selection has been made in a combobox in a subform? I need to send a Msgbox to the user... "You can't select this without selecting option 1 and 2 also..."

Should I use a query and then  apply it to the value "on dirty"?
Evert JorDVM/ResearcherAsked:
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mbizupConnect With a Mentor Commented:
For code in one subform, referring to a control in another subform:

If Me.Parent.OtherChildForm.Combo1 = "xyz" Then
      ' Etc...

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mbizupCommented:
It depends on where the code is located relative to your combo boxes, and also when you want this message to be triggered.

<< You can't select this without selecting option 1 and 2 also..>>

Also are we trying to detect choices in one or two different combo boxes?

(Your question is a little ambiguous)

If you want to run this code when a user makes a selection in a combo box on the main form, use the Before update event of your main form combo:

Private Sub cboYourMainFormCombo_BeforeUpdate(Cancel as integer)
If Me.cboYourMainFormCombo = "some value" then
      if Not(Me.SubformName.Form.Combo1 = "Value1" And Me.SubformName.Form.Combo2 = "Value2" Then
              msgbox "You cannot make this selection without first selecting Value1 and Value2"
              cancel = true
     end if
End if
End Sub

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Jeffrey CoachmanMIS LiasonCommented:
<(Your question is a little ambiguous)>
Yes, a bit unclear...
Here I will presume that an "Option" is an actual "Option Button" (Boolean value)
...and that the two options needing to be selected together, is always the case.

Then (Pending clarification), ...another approach might be to "Disable" the combobox in the first place.
...Instead of letting them go trough all the trouble of selecting a value, (Then thinking it will work) only to find out that it wont.

Private Sub Form_Current()
    Call ValidateOptions
End Sub

Private Sub opt1_AfterUpdate()
    Call ValidateOptions
End Sub

Private Sub opt2_Click()
    Call ValidateOptions
End Sub

Private Sub ValidateOptions()
    If Me.opt1 = True And Me.opt2 = True Then
        Me.State.Enabled = True
    Else
        Me.State.Enabled = False
    End If
End Sub


Very simple sample attached
Database40.mdb
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Evert JorDVM/ResearcherAuthor Commented:
Hi mbizup.

The control is in a subform and refers to a choice in another subform. Both on a main form (of course)...

Thanks so far. Regards.
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Evert JorDVM/ResearcherAuthor Commented:
boag2000:

The module you refer to in your code isn't included in your example file.
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Evert JorDVM/ResearcherAuthor Commented:
Thanks a lot for your help, I need to work a bit with this to get the functionality I need.
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