How to obtain handle to a character based field thru API

You need to use the FindWindowEx API to get the handle of the Edit control.

VB Code:

hParent = FindWindowEx(0, 0, "ParentWindowClass","ParentWindowName")
If hParent <> 0 Then
    hChlid = FindWindowEx(hParent,0,"Edit",vbNullString)
    If hChild <> 0 Then
        SendMessage hChild, WM_SETTEXT, 0, ByVal "MyText"
    End If
End If

hchild is returning zero. What should the "Edit" be replaced with? Shoul it be the actual field name ? I tried GETNEXTWINDOW(hparent, GW_CHILD) and I got the handle for the window status bar. What am i doing wrong?????