Specified repeat count is not valid

Question

I'm experimenting with a simple auto typer. I've made several of these before, but have never received this error. I just want to be able to send the text within textbox3 to the currently focused window. Here's the code :

code:

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
    If Timer1.Enabled = False Then
        Timer1.Enabled = True
        Button2.Text = "Stop"
    ElseIf Timer1.Enabled = True Then
        Timer1.Enabled = False
        Button2.Text = "Send"
    End If


End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    If CheckBox1.Checked = True Then
        SendKeys.Send("{ENTER}")
        SendKeys.Send(TextBox3.Text)
    ElseIf CheckBox1.Checked = False Then
        SendKeys.Send(TextBox3.Text)
    End If
End Sub

Private Sub NumericUpDown1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NumericUpDown1.ValueChanged
    Timer1.Interval = NumericUpDown1.Value
End Sub

Thats the only portion involving the sendkeys method and timer. Some of the text within textbox3 comes from variables as well, if that helps to know.

What does `TextBox3` contain at the time? This quote from the documentation seems relevant: `To specify repeating keys, use the form {key number}. You must put a space between key and number. For example, {LEFT 42} means press the LEFT ARROW key 42 times; {h 10} means press H 10 times.` — jmcilhinney, Jul 08 '14 at 06:18

score 1 · Answer 1 · answered Jul 09 '14 at 16:43

In another (now deleted) question, you claim the error happens here:

SendKeys.Send(Textbox3.Text)

Well, what is the value of Textbox3.Text which produces the error? According to the documentation, specifying repeated keys would involve a key token and an integer separate by a space, enclosed in curly braces. Something like "{LEFT 42}" or "{h 10}". So if you're entering something like "{A B}" then it's going to fail.

Presumably the runtime value of Textbox3.Text has an invalid format for SendKeys.Send(), or is mis-using characters which are otherwise reserved for the format string.

Specified repeat count is not valid

code:

1 Answers1