[Logical]

Setup;

Make the program look somewhat like the image.
(2 buttons, a textbox, and a timer.)

Spoiler:

Then add the following to the code.

Code:

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Timer1.Stop()
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Timer1.Start()
    End Sub

    Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Timer1.Enabled = False
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        SendKeys.Send(TextBox1.Text)
        SendKeys.Send("{Enter}")
    End Sub

    Private Sub TabPage2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub
End Class

How to use it;

1. Enter the desired text into the textbox.
   
2. Click the "Start" Button. (Button1)
   
3. When you want it to stop, click the "Stop" button. (Button2)
   
4. To change the time between messages change the interval on the timer. (click the timer and edit into the box to the right. (shown below.))
   

Spoiler:

[+Respawn]

Wow HQ, Great share! I bet this will come to some good use someday or anyday

[Logical]

Wow HQ, Great share! I bet this will come to some good use someday or anyday

Great!

Tell me if there's any tutorial i should make.

[Falcon]

Very HQ, thanks for sharing this bro