mTECH 270

double click on the textbox you want to trap, goto procedure and select keypress

Sub Text1_KeyPress(KeyAscii as Integer)
If KeyAscii >= vbKeyA And KeyAscii <= vbKeyZ Then
Exit Sub
Else
KeyAscii = 0
Beep
End If
End Sub

Visual Basic offers a rich assortment of built-in functions. The on-line help utility
will give you information on any or all of these functions and their use. Some
examples are:


Function                      Value Returned
Abs                              Absolute value of a number
Asc                              ASCII or ANSI code of a character
Chr                              Character corresponding to a given ASCII or ANSI code
Cos                              Cosine of an angle
Date                             Current date as a text string
Format                         Date or number converted to a text string
Left                              Selected left side of a text string
Len                              Number of characters in a text string
Mid                             Selected portion of a text string
Now                           Current time and date
Right                           Selected right end of a text string
Rnd                            Random number
Sin                             Sine of an angle
Sqr                            Square root of a number
Str                            Number converted to a text string
Time                         Current time as a text string
Timer                        Number of seconds elapsed since midnight
Val                            Numeric value of a given text string

ARITHETIC OPERATORS
 
Operator     Operation
^                   Exponentiation
* /                 Multiplication and division
\                    Integer division (truncates)
 %                 Mod Modulus
+ -                Addition and subutraction



CONCERTINATION

To concatentate two strings, use the & symbol or the + symbol: e.g
lblTime.Caption = "The current time is" & Format(Now, “hh:mm”)
txtSample.Text = "Hook this “ + “to this”


 COMPARISON OPERATORS

Operator        Comparison
>                     Greater than
<                     Less than
>=                   Greater than or equal to
<=                   Less than or equal to
=                     Equal to
<>                   Not equal to


LOGICAL OPERATORS

Operator          Operation
Not                   Logical not
And                  Logical and
Or                    Logical or
 

USE

<select name="select1"> 

 <option value="1">1</option> 

 <option value="2">2</option> 

 <option value="3">3</option> 

</select>

THIS IS THE CHECKBOX 

<input type="checkbox" id="checkboxA"> click to disable<br>
<input type="text" id="textbox_A"> 
<input type="text" id="textbox_B">

THIS IS THE JAVASCRIPT

<script type="text/javascript"> 
function disablefields(){ 
if (document.getElementById('checkboxA').checked == 1){ 
document.getElementById('textbox_A').disabled='disabled'; 
document.getElementById('textbox_A').value='disabled';
document.getElementById('textbox_B').disabled='disabled'; 
document.getElementById('textbox_B').value='disabled';
}else{ 
document.getElementById('textbox_A').disabled=''; 
document.getElementById('textbox_A').value='Allowed'; 
document.getElementById('textbox_B').disabled=''; 
document.getElementById('textbox_B').value='Allowed'; 
} 
} 
</script>