Getting Text From Another Program

What I'm trying to do is get text inside of a text box in another program. I've tried a bunch of stuff but nothing seems to work,
i'll either get a response of zero or get nothing.
Anyone able to Help ?

VB Code:

Private Sub Command1_Click()
 Dim DRText As String
 
Dim gwintext As String  ' receives the copied text from the target window
Dim glength As Long  ' length of the window text
Dim gretval As Long  ' return value of message
 
 
glength = SendMessage(DRGame, WM_GETTEXTLENGTH, CLng(0), CLng(0)) + 1
gwintext = Space(glength)
 
gretval = SendMessage(DRGame, WM_GETTEXT, ByVal glength, ByVal gwintext)
 
DRText = Left(gwintext, gretval)
 
 Text1.Text = DRText
End Sub
 
 
 
Private Sub Form_Load()
'Sets Caption for Taskbar Item
 
'Finds DRTextbox
'Finds DR
EnumWindows AddressOf EnumWindowsProc, 0
EnumChildWindows DRhwnd, AddressOf EnumChildProc, 0
EnumChildWindows DRhwnd, AddressOf EnumGameProc, 0
 
End Sub

btw I'm not trying to get the caption of the window but its actualy
content, Anyone have any ideas ?

Thanks for the reply yapp i'll try out your suggestions. I've been
having alot of trouble with this problem or at least getting
others to understand it :) which results in me getting the same
code snippets that all do the same thing which i already know
how to do :)