I have been working on making some trainers for some games and I wanted a basic way of showing that a cheat was enabled. I couldn't figured out how to draw to the screen so I figured the title bar would be fine.

Code:
 Declare Function SetWindowText Lib "user32" Alias "SetWindowTextA" (ByVal hWnd As IntPtr, ByVal lpString As String) As Boolean

    Public Sub SetTitleText(ByVal processName() As Process, ByVal textToSend As String)

        For Each proc In processName
            SetWindowText(proc.MainWindowHandle, textToSend)
        Next
    End Sub
The code above will allow you to set the title window to an external program.

An example on how to use it

Code:
Dim notepad() As Process = Process.GetProcessesByName("notepad")

    Private Sub btn_Notepad_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Notepad.Click
       SetTitleText(notepad,"Insert some text here")

    End Sub