error in code

I'm working on a program and withen it i need to take a value from a textbox in one form to text box in another form

i wrote this code to do this

Code:

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Public Class Form4
    Dim generator As New Random

        MaskedTextBox1.Text = generator.Next(Form3.MaskedTextBox1.Text)
        MaskedTextBox2.Text = generator.Next(1111111, 9999999)

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i have two text box in form4

in the first one i need to take a value from3 randomally

in the second one i need to generate a random data ..


when i run the code i face a probem, the program tes me that there is an error;

Conversion from string " -" to type 'Integer' is not valid.


Can anybody plz tell me what's wrong ??

I linked the program with my database (access) by new source data

Random.Next Takes an Integer as Input. Check your Maskedinput Text. It may contain - symbol in the Text. You could like removing the - from the Text as

Code:

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generator.Next(Form3.MaskedTextBox1.Text.Remove("-",""))

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is the One Option