help with coding

Hey, this is a part from my (noob) spambot, this is the part to choose the 'spam count' (how much time the program should spam the text form textbox1)

Attachment 31127

textbox1.text, where the user writes his spam message
textbox3.text, where the user writes the delay, used if radiobutton10 checked
my.settings.rb10 = 6 , can be changed in program
1, 3, 5, 7 are the values of radiobutton6-9, and the values of my.settings.rb6-9 till they get changed in program @settings

If RadioButton10.Checked = True Then
My.Settings.rb10 = TextBox3.Text
For Me.x = 1 To My.Settings.rb10
SendKeys.Send(TextBox1.Text)
SendKeys.Send("{enter}")
Next
ElseIf RadioButton6.Checked = True Then
For Me.x = 1 To My.Settings.rb6
SendKeys.Send(TextBox1.Text)
SendKeys.Send("{enter}")
Next
ElseIf RadioButton7.Checked = True Then
For Me.x = 1 To My.Settings.rb7
SendKeys.Send(TextBox1.Text)
SendKeys.Send("{enter}")
Next
ElseIf RadioButton8.Checked = True Then
For Me.x = 1 To My.Settings.rb8
SendKeys.Send(TextBox1.Text)
SendKeys.Send("{enter}")
Next
ElseIf RadioButton9.Checked = True Then
For Me.x = 1 To My.Settings.rb9
SendKeys.Send(TextBox1.Text)
SendKeys.Send("{enter}")
Next

I want to make that working like that:
e.g. chosen spam count: 4 (4 message at a time), written message into textbox1: Spammessage asdasdasd

Spammessage asdasdasd .0
Spammessage asdasdasd .1
Spammessage asdasdasd .2
Spammessage asdasdasd .3
Spammessage asdasdasd .4

Spammessage asdasdasd .5
Spammessage asdasdasd .6
Spammessage asdasdasd .7
Spammessage asdasdasd .8
Spammessage asdasdasd .9

and so on...

It should add " .0" and increments it
or any other style :)
any suggestions or done ...?
Thx and sry if I made a bad job :)
correct me, help me, suggest !