[RESOLVED] [2008] Adding TabPages at runtime, BackColor is wrong!

[NickThissen]

You could create a custom tabpage control (which inherits tabpage) and set the colour as it is initialised

I don't see how that is any different from just setting the BackColor after I create the TabPage. I still don't know what color to set it to, since it can be different for every type of Windows, every Theme etc...
I also saw this behaviour in all of my custom tabcontrols (I made quite a few); they all had a gray background. I just set it to White manually though because I was using Vista back then, I didn't even think about users on XP who might find a white background strange (oops!).

or you could have one created at designtime and made invisible... then create new instance at runtime.

I just tried this but I didn't get it to work correctly, can you explain this further?

I added just a blank TabPage (TabPage1) and changed the code to this:

Dim cList As List(Of objDataInfo)
 
    Public Sub New(ByVal n As Integer)
        InitializeComponent()
 
        cList = New List(Of objDataInfo)
 
        'Create tabpages on the fly
        For i As Integer = 1 To n
            Dim t As TabPage = TabPage1
            t.Text = "Objective " & i
            Dim c As objDataInfo = New objDataInfo(i)
            t.Controls.Add(c)
            c.Dock = DockStyle.Fill
            c.Visible = True
 
            tab.TabPages.Add(t)
        Next
        tab.TabPages.Remove(TabPage1)
    End Sub

The BackColor is now correct, but I just see a blank "TabPage 5" (n = 5) 5 times. There is no sign of my control, and only TabPage5 appears (5 times...)

Not very surprising actually since I'm just copying the same tabpage into the TabControl 5 times..?

I probably didn't understand correctly.