tabchanged property

[adev111]

Hi there,
i have a tabcontrol which has three tabs.
One can not do anything on page 2, if information on page 1 is not entered.
I am thinking of using the function TabControl1_TabIndexChanged but can't really seem to get it working right.
I want to show a msgbox saying that i must enter information on page1, before going to page2.
Can someone give me any suggestions?

Thanks

 

[Horowitz]

Private Sub TabControl1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles TabControl1.SelectedIndexChanged

If TabPage2.Focus = True Then
//check or validate the user's data input
MsgBox("there are empty fields")
//give the focus to tabpage1 (index=0)
TabControl1.SelectedIndex = 0
End if

End Sub

Should i explain more?

 

[adev111]

Hi there,
i tried as you said but i get An exception
unhandled exception of type 'System.InvalidCastException' occurred in microsoft.visualbasic.dll

Additional information: Cast from string "0False" to type 'Double' is not valid.

What i m doing is enabl
If (enabl = 0 & (TabPage2.Focus = True)) Then
MsgBox("hiiiii")
End If

I know its something to do with cast. Should i have the enabl to be boolean?

 

[adev111]

Hi there, i got it to work using
If TabControl1.SelectedIndex = 1 Then
If enabl = 0 Then
MsgBox("hiiiii")
End If
End If