I am creating my first dnn module and to make the story short here is the concept I am having trouble with:

When I press a button I want put text in a label.
Here is my procedure to put the messsage into the label:

Sub setMessage(ByVal strMessage As String)
            Dim lblMessage As Label = New Label
            lblMessage = CType(lstContent.FindControl("lblError"), Label)
            lblMessage.Text = strMessage
End Sub

This is my label:
<asp:Label ID="lblMessage" runat="server" Text="" CssClass="c_message"></asp:Label>

on my page there is a datalist named lstContent. the label is within the datalist.
But I have tried to put the label outside the datalist for testing and that also doesn't work.

to find my label I've tried to address the label directly, I've tried page.FindControl(lblMessage) and when the label is in the datalist I've tried the lstContent.FindControl(lblMessage). Also tried Page.Form.FindControl("lblMessage")

Can anyone tell me when what I am doing wrong or what I am missing. Is there another control I have got to adress to retrieve my label?

All help is really appreciated. Thanks in advance.

1. Why is the label in a list control?  Will you potentially load more than one?

2. If it is outside the list, then as jipsen said, it should be available to your code (assuming you declared it in the code behind.)

3. The code you pasted is finding "lblError" but the ID is "lblMessage" ?

Your declaration should look like this:

Protected WithEvents lblMessage As System.Web.UI.WebControls.Label

And it should be outside of any method.  It is possible a difference in environment could be causing you the problem.  Check the code in the region - #Region " Web Form Designer Generated Code " in the app that works and see if you find the declaration for btnVerzenden.