How do I divide a string into three parts ?

//
// Summary:
//     Retrieves a substring from this instance. The substring starts at a specified
//     character position and has a specified length.
//
// Parameters:
//   startIndex:
//     The zero-based starting character position of a substring in this instance.
//
//   length:
//     The number of characters in the substring.
//
// Returns:
//     A string that is equivalent to the substring of length length that begins at
//     startIndex in this instance, or System.String.Empty if startIndex is equal to
//     the length of this instance and length is zero.
//
// Exceptions:
//   T:System.ArgumentOutOfRangeException:
//     startIndex plus length indicates a position not within this instance.-or- startIndex
//     or length is less than zero.
[SecuritySafeCritical]
public String Substring(int startIndex, int length);
//
// Summary:
//     Retrieves a substring from this instance. The substring starts at a specified
//     character position and continues to the end of the string.
//
// Parameters:
//   startIndex:
//     The zero-based starting character position of a substring in this instance.
//
// Returns:
//     A string that is equivalent to the substring that begins at startIndex in this
//     instance, or System.String.Empty if startIndex is equal to the length of this
//     instance.
//
// Exceptions:
//   T:System.ArgumentOutOfRangeException:
//     startIndex is less than zero or greater than the length of this instance.
public String Substring(int startIndex);

Dim length1 as string
Dim length2 as string
Dim lenght3 as string
length1 = Text1.text.Substring(0, 9)
length2 = Text1.text.Substring(10, 19)
length3 = Text1.text.Substring(20, 29)