Sneaker Riley M Sand Casual Women's 11 Vionic wvqFRxw

Sneaker Riley M Sand Casual Women's 11 Vionic wvqFRxw

Subprograms and Functions in Visual Basic

Vionic Sand Women's Riley M Sneaker 11 Casual by Herbert J. Bernstein

© Copyright 1999 Herbert J. Bernstein


We discuss the organization of code in Visual Basic into subprograms and functions.

The natural structure of a Visual Basic program is as independent sections of code delimited by "Private Sub ObjectName_Event" and "Sneaker M Women's Casual Vionic Sand 11 Riley End Sub" statements. Each of the sections of code is a handler for the indicated event for the designated object. There are many names for such sections of code which compose a larger program: subprogram, subroutine, subprocedure, subfunction etc. Such modular organization need not be restricted to handlers for events. Any coherent portion of code may be broken out into a subprocedure or function and used from other places in the program. An event handler is an example of a subprocedure. A function differs from a subprocedure in being able to return a value.


A subprocedure is of the form

Riley Sand 11 Vionic Casual M Sneaker Women's Private Sub Procedurename() Statement
Riley M 11 Women's Vionic Sand Sneaker Casual
End Sub
or Private Sub Procedurename( Riley M Women's Sand 11 Casual Vionic Sneaker argument AS type, …) Statement
End Sub
black University Running Air 2 black Mens Nike Max Sequent Red Shoes qaFxB7v

A function is of the form

Private Function Procedurename( argument AS type, …) AS functiontype Statement

Procedurename = …

End Function

A subprocedure or function may be created from the "Tools" menu or simply typed in in the (General) section of the code page. The types of arguments and of a function return may be sepcified by the single character type indicators instead of with AS.

Just as clicking on a command button generates an event that starts the execution of the appropriate event handler, the statement

Call Procedurename If there are no arguments, or Call Procedurename( arguments )

If there are arguments starts the execution of the subprocedure. Once the subprocedure has run, execution continues at the statement after the call. The number of arguments in the call should match the number of arguments in the declaration, and while Basic will do some conversions automatically, it is best if the types match as well.

An alternative form of Call is to use the procedure name as a command followed by the arguments without the surrounding parentheses.

A function with its arguments is used in expressions in place of variables, providing the results of its execution at that point in the expression. For example if we have a command button, Command1, two text boxes for numeric input, Text1 and text2 and a picture box for output, we can apply the Pythagorean theorem with:

Private Function hypotenuse(a AS Double, b AS Double) AS Double hypotenuse = Sqr(a^2 + b^2) End Function

Private Sub Command1_Click()

Picture1.Print hypotenuse(Val#(Text1.Text),Val#(Text2.Text))
End Sub

We have used the built-in function Sqr. There are several useful built-in functions, some of which are given in the following table:



Lace New Cole Techni Kenneth Up York Lining Kam Fashion 37 Mint Women's 5 Sneaker XAanUWWalking Khaki Unisex Slippers Shoes Sandal Aleader Garden Comfort RaBCzwzSqWedge Leopard 5 Ankle Up Womens Sally Bootie Anna Lace qXn8Zvxw1


Trask Black Italian Womens Sheepskin Ali Washed rq4rtEwC1

Absolute value of arg


ASCII numeric code for the first character of str$


Casual M 11 Vionic Women's Sand Riley Sneaker

Arctangent of arg

Vionic Sand Sneaker 11 M Riley Women's Casual


Women's 11 M Sand Vionic Casual Sneaker Riley One character string for which arg is the ASCII numeric code


Converts arg to the indicated type, where type is one of Bool, Byte, Cur, Date, Dbl, Int, Lng, Sng, Str or Var

11 Casual Sneaker Sand Vionic M Riley Women's Cos(arg)

Cosine of arg in radians

Women's Vionic Sneaker 11 M Casual Riley Sand Exp(arg)

e to the power arg


Women's Just Aqua Navy Fashion Sneaker Skechers Relax Sport fz6xvqv

Integer part of arg (by truncation)

Format (arg,str$)

String derived from arg using format string str$


String representing arg as hexadecimal

11 Sneaker M Riley Women's Sand Casual Vionic


Position of probe$ in str$ or 0

InStr(offset, str$,probe$)

Hoka Women's Running Topaz 4 One Imperial Clifton Shoe Blue zfRPzvw

As with Instr, but starting at offset


Largest integer <= arg

Riley Casual Vionic Sand Women's M 11 Sneaker


Leftmost n characters of str$


Length of str$


Natural logarithm of arg

Caramel Suede Klein Pump Women's Calvin Gayle New wqzxp1TX

Mid$(str$,offset, n)

Substring of str$ of length n starting at offset. May be usede as the left hand side of an assignment


String representing arg as octal


Rightmost n characters of str$


Random number from 0 to 1

Vionic Casual Riley Sand Sneaker M Women's 11


-1 if arg is negative, 0 is arg is zero, 1 if arg is positive


Sine of arg in radians

Riley 11 Women's Casual M Vionic Sand Sneaker


String os n spaces


Square root of arg


String representing the number in arg


Tangent of arg in radians


M Sand 11 Vionic Sneaker Riley Women's Casual Number represented by str$


M Casual Vionic Women's Sneaker Sand 11 Riley Top Ballet Strappy 3 Ts Flat Black Brea Women's Moda zxwXtrqz

Last Updated on 24 October 1999
By Herbert J. Bernstein
Men's Grey Blend umber black Shoe Outdoor Adidas Ax2 Hiking pw6Bpxn