Access 2000 Focus and Disable

[RDeen]

I have a form and two subforms which are placed on three tabs, tbctl1 (Page1, main, Page2, sub, Page3, sub which is programmed to be a sub for Page2). Following is the code behind three switchboard commands;

cmd1:
Private Sub cmd1_Click()
DoCmd.OpenForm "frmAddARisk"
With Forms!frmAddARisk
!Page1.Visible = True
!Page2.Visible = False
!Page3.Visible = False
!Page4.Visible = False
!Page5.Visible = False
!Combo140.Enabled = False
!txtRiskLossHoursActual.Enabled = False
!txtRiskResolutionDate.Enabled = False
!txtRiskEntryDate.Enabled = True
!txtRiskSubmittedBy.Enabled = True
!txtRiskTitle.Enabled = True
!txtRiskDesc.Enabled = True
!txtRiskLossHoursEst.Enabled = True
End With
End Sub

cmd2:
Private Sub cmd2_Click()
DoCmd.OpenForm "frmAddARisk"
With Forms!frmAddARisk
!Page1.Visible = True
!Page2.Visible = False
!Page3.Visible = False
!Page4.Visible = False
!Page5.Visible = False
!Combo140.Enabled = True
!txtRiskLossHoursActual.Enabled = True
!txtRiskResolutionDate.Enabled = True
!txtRiskEntryDate.Enabled = False
!txtRiskSubmittedBy.Enabled = False
!txtRiskTitle.Enabled = False
!txtRiskDesc.Enabled = False
!txtRiskLossHoursEst.Enabled = False
MsgBox "To Modify A Risk You Must Select A Risk Title"
End With
End Sub

cmd3:
Private Sub cmd3_Click()
DoCmd.OpenForm "frmAddARisk"
With Forms!frmAddARisk
!Page1.Visible = False
!Page2.Visible = True
!Page3.Visible = False
MsgBox "To Add A Risk Cause You Must Select A Risk"
End With
End Sub

I have two issues…
1. When I try the cmd3 button first (which is Page2), I get the error “You can’t hide a control that has the focus”. (Don't want that!)
2. I want to disable fields on Page 2 until the combo box (on Page 2) is selected.

I have tried coding this… I hope it is specific enough. Does anyone have code and advice as to where to put it?