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TX Text Control

News and interesting articles about the word processing component TX Text Control.

Implementing AutoText with TX Text Control and TX Spell .NET

AutoText is a powerful utility when typing lot of letters, e-mails or any other text. In a recent blog entry, I described how to solve this using the SpellCheckText event of TX Text Control. If you are using TX Spell .NET in combination with TX Text Control, the SpellCheckText event is blocked to avoid a potential interplay of two event listeners which might cause infinite loops.

You can easily replace the SpellCheckText event with the Changed event in order to replace keywords. The following code shows how to do that:

Hashtable htAutoCorrect;

// create a new hash table for the replacements
htAutoCorrect = new Hashtable();
htAutoCorrect["vbb"] = "Visual Basic";
htAutoCorrect["css"] = "CSharp";

private void textControl1_Changed(object sender, EventArgs e)
// check the MisspelledWord collection for entries in the
// hash table. Replace the word immediately.
// Shortcut (key in hash table) must be unique and
// "misspelled" for the spell checker
foreach (MisspelledWord word in textControl1.MisspelledWords)
if (htAutoCorrect.ContainsKey(word.Text))
int iStart =
((string)htAutoCorrect[word.Text]).Length - word.Length;

textControl1.Selection.Start += iStart;


Implementing AutoCorrect using TX Spell .NET's suggestions

While the above method uses a custom hash table to replace keywords with it's fixed values, you might want to replace misspelled words automatically on a specific action such as pressing {CTRL}+{SPACE}. The following code shows how to trap the keystrokes, get the misspelled word at the current text position and how to replace this misspelled word with the first suggestion from TX Spell .NET:

bool bActionKeys = false;

private void textControl1_KeyDown(object sender, KeyEventArgs e)
if (e.Control && e.KeyCode == Keys.Space)
bActionKeys = true;

private void textControl1_KeyPress(object sender, KeyPressEventArgs e)
if (bActionKeys == true)
e.Handled = true;
bActionKeys = false;

MisspelledWord word = textControl1.MisspelledWords.GetItem(


if (txSpellChecker1.Suggestions.Count == 0)

int iStart = txSpellChecker1.Suggestions[0].Text.Length - word.Length;

word, txSpellChecker1.Suggestions[0].Text);

if(iStart > 0)
textControl1.Selection.Start += iStart;
textControl1.Selection.Start -= iStart;

About TX Text Control:

TX Text Control was originally released in 1991, since then more than 50,000 copies have been sold. Starting off as a single, small DLL, TX Text Control has made its way through 16-bit DLL and VBX versions to today‘s Enterprise edition with its .NET and ActiveX components. The recent addition to the family, TX Text Control .NET Server, offers all of TX Text Control advanced word processing functionality in an easy-to-use server-side .NET component. Customers benefit from these years of experience, large user base, and at the same time, appreciate developing with a mature, reliable product.

Contact Informations:

North & South America:
Phone: +1 704-370-0110
Phone: +1 877-462-4772 (toll free)

Phone: +49 (0)421 42 70 67 10

Asia Pacific:
Phone: +886 2-2797-8508
Published Wednesday, November 30, 2011 5:41 AM by Christopher Krause

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