C#

---

"When the only tool you have is a hammer, a sore thumb you will have."

---

"When the only tool you have is a hammer, a sore thumb you will have."

---

"When the only tool you have is a hammer, a sore thumb you will have."

---

"When the only tool you have is a hammer, a sore thumb you will have."

---

"When the only tool you have is a hammer, a sore thumb you will have."

---

"When the only tool you have is a hammer, a sore thumb you will have."

//Your string
string s = "0 @IQLNP-M7@ INDI" + Environment.NewLine;
s += "1 NAME Benoni /THOMPSON/" + Environment.NewLine;
s += "2 GIVN Benoni" + Environment.NewLine;
s += "2 SURN THOMPSON" + Environment.NewLine;
s += "1 AFN QLNP-M7" + Environment.NewLine;
s += "1 SEX M" + Environment.NewLine;
s += "1 SOUR @S01@" + Environment.NewLine;
s += "1 BIRT" + Environment.NewLine;
s += "2 DATE 14 Apr 1782" + Environment.NewLine;
s += "2 PLAC Alstead, N.h." + Environment.NewLine;
s += "1 DEAT" + Environment.NewLine;
s += "2 DATE 24 Oct 1857" + Environment.NewLine;
s += "2 PLAC Shalersville, N.h." + Environment.NewLine;
s += "1 FAMS @F6073064@" + Environment.NewLine;
s += "1 FAMC @F6073065@" + Environment.NewLine;
s += "0 @IQLNP-KV@ INDI" + Environment.NewLine;
s += "1 NAME Job /THOMPSON/" + Environment.NewLine;
s += "2 GIVN Job" + Environment.NewLine;
s += "2 SURN THOMPSON" + Environment.NewLine;
s += "1 AFN QLNP-KV" + Environment.NewLine;
s += "1 SEX M" + Environment.NewLine;
s += "1 SOUR @S01@" + Environment.NewLine;
s += "1 FAMS @F6073065@" + Environment.NewLine;
s += "0 @IQLNP-L2@ INDI" + Environment.NewLine;
s += "1 NAME Lovice /CRANE/" + Environment.NewLine;
s += "2 GIVN Lovice" + Environment.NewLine;
s += "2 SURN CRANE" + Environment.NewLine;
s += "1 AFN QLNP-L2" + Environment.NewLine;
s += "1 SEX F" + Environment.NewLine;
s += "1 SOUR @S01@" + Environment.NewLine;
s += "1 FAMS @F6073065@" + Environment.NewLine;

//We are going to make our way through the string looking for Environment.NewLine + "0 "
//this is our current index.
int index = 0;
//To hold indexes of found strings
System.Collections.ArrayList indexList = new System.Collections.ArrayList();
//Start with zero
indexList.Add(0);
//Loop until none found
while (index != -1)
{
    //Look for index
    index = s.IndexOf(Environment.NewLine + "0 ", index + 1, s.Length - (index + 1));

    //Add if found
    if(index != -1)
    {
        indexList.Add(index);
    }
}

//string array to, hold split strings
string[] splitStrings = new string[indexList.Count];

//Loop over our indexes
for(int i = 0 ; i < indexList.Count ; i++)
{
    //if ots the last one - get string to end
    if(i == indexList.Count - 1)
    {
        splitStrings[i] = s.Substring(Convert.ToInt32(indexList[i]), s.Length - Convert.ToInt32(indexList[i]));
    }
    //otherwise use next index
    else
    {
        splitStrings[i] = s.Substring(Convert.ToInt32(indexList[i]), Convert.ToInt32(indexList[i+1])-Convert.ToInt32(indexList[i]));
    }

    //remove excess newline
    if(splitStrings[i].StartsWith(Environment.NewLine))
    {
        splitStrings[i] = splitStrings[i].Substring(Environment.NewLine.Length, splitStrings[i].Length - Environment.NewLine.Length);
    }
}

//display
foreach(string newString in splitStrings)
{
    MessageBox.Show(newString);
}

e.Graphics.DrawLine(0, 0, this.Width, this.Height);

Graphics grfx = e.Graphics;
grfx.DrawLine(0, 0, this.Width, this.Height);