Help using SendMessage() & WM_GETTEXT

I am having some problems understanding and implementing WM_GETTEXT.

I am writing an application in which I need to get the text from a RichEdit text box in another running windows application. Through research I have come to the conclusion that I need to use WM_GETTEXT, yet I am having some difficulty.

The first problem I am running into is figureing out the hwnd of the window that contains the text box that I need to pull data from. In the task manager the title is "Picnic 12945 - Play online". I also downloaded winspecter that lets me see the hwnd of the window, but I cant figure out how to find this dynamically. To add additional complexity to the problem there are multiple picnics that I could be accessing from time to time.

The second problem is if I am able to find this hwnd then I am unsure as to how to access the individual control (text box) in that window.

I have spent many hours searching forums and google for a soultion. If you could offer some help it would be greatly apprecaited.

Thank you,
-Patrick

I am still stumped on the WM_GETTEXT method. I have recieved the handles of the application and of the RICHEDIT control but the gettext dosent return anything. Here is the code of what I have tried.

Code:

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    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim dvhwnd As Integer = FindWindowEx(myHandle, 0, "RICHEDIT", "")
        Dim TxtLen As Integer
        Dim txt As String
        Dim txtFinal As String
        Dim txtFinal2 As String

        TxtLen = SendMessage(dvhwnd, WM_GETTEXTLENGTH, 0, 0)
        txtFinal2 = SendMessage(dvhwnd, WM_GETTEXT, TxtLen + 1, TxtLen)
        txtFinal = Trim(txt)
        MessageBox.Show("TextLen =" & TxtLen)
        MessageBox.Show("txt:" & txt)
        MessageBox.Show("txtFinal:" & txtFinal)
        MessageBox.Show("txtFinal2:" & txtFinal2)

        lbl3.Text = myHandle

    End Sub

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THanks,
Patrick

Solved.

Thanks for the help