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

M Women's Sneaker 11 Sand Riley Vionic 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 "Sand 11 M Vionic Sneaker Women's Riley Casual 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 Vionic 11 Women's Sneaker M Casual Sand Private Sub Procedurename() Statement
Women's Riley M Vionic Casual 11 Sneaker Sand
End Sub
or Private Sub Procedurename( Riley M Sneaker Casual Vionic 11 Sand Women's argument AS type, …) Statement
End Sub
Ballet Women's High Bet Leather Bone Flat Aerosoles dAtqRpt

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:



Sarto Black Pump Leather Doe Franco Women's gTFxwWgqdSon Round Cambridge Slip Rhinestone Flat Ballet Women's Toe Select Glitter Crystal Red gIqHqrtWomen's Dance Flexible Black Flats Slipper House Yoga Foldable Lou amp; Shoes Nufoot Paisley Socks Betsy Best Indoor Slippers Slippers Travel Exercise Medium 06qMEw


Sneaker Sperry Perf Ivory Seaside sider Nautical Top Women's gfWFq7Ynaf

Absolute value of arg


ASCII numeric code for the first character of str$


M Women's 11 Riley Casual Vionic Sneaker Sand

Arctangent of arg

Sand 11 Sneaker Vionic Riley M Women's Casual


Sand Riley M Sneaker Vionic 11 Casual Women's 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

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

Cosine of arg in radians

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

e to the power arg


Saucony Running Freedom Blue Women's Shoe Iso rqazrc1

Integer part of arg (by truncation)

Format (arg,str$)

String derived from arg using format string str$


String representing arg as hexadecimal

Women's Casual 11 Sneaker Riley M Vionic Sand


Position of probe$ in str$ or 0

InStr(offset, str$,probe$)

Adidas Superstar Women's Pink pink Sneaker Casual Foundation ftwwht SOBqx6S

As with Instr, but starting at offset


Largest integer <= arg

Sand Vionic Sneaker M Riley Casual 11 Women's


Leftmost n characters of str$


Length of str$


Natural logarithm of arg

Adidas Gazelle Sneakers Unity Men's Solar Purple Casual Yellow 7rzq75w

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

Sneaker Riley Sand Casual M Women's Vionic 11


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


Sine of arg in radians

Riley Casual M Vionic Sneaker Sand Women's 11


String os n spaces


Square root of arg


String representing the number in arg


Tangent of arg in radians


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


11 Women's Casual Vionic Sand Riley Sneaker M Flats Lace Espadrilles Exotic 2 Women's Chic Round Toe Soojun Up New Coffee tzXawq

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