Formatting Data and Calling Event Procedures in VB6.0

VISUAL BASIC 6.0

FORMATTING DATA

To Format data for display, either on the printer or on the screen, use the formatting functions.

i.The FormatCurrency Function

            The FormatCurrency function returns a string of characters formatted as dollars and cents.  By default, the currency value displays a dollar sign, commas and two positions to the right of the decimal point.

General Format

            FormatCurrency(NumericExpressionToFormat)

Example

            lblBalance.Caption = FormatCurrency(curBalance)

Variable

Value

Function

Output

curBalance

1275.675

Formatcurrency (curBalance)

$1,275.68

sngAmount

.9

Formatcurrency (sngAmount)

$0.09

 

ii.The FormatNumber Function

            The FormatNumber function is similar to the FormatCurrency function.  The default format is determined by your computer’s regional setting; it will generally display commas and two digits to the right of the decimal point.

General Format

            FormatNumber(Expression-To-Format)

Example

            lblsum.Caption = FormatNumber(curSum)

            lblCount.Caption = FormatNumber(intCount)

Variable

Value

Function

Output

mcurTotal

1125.67

FormatNumber (mcurTotal, 0)

1,126

curBalance

1234.567

FormatNumber (curBalance, 2)

1,234.57

 

iii.The FormatPercent Function

            To display numeric values as a percent, use the FormatPercent function.  This function multiplies the argument by 100, adds a percent sign, and rounds to two decimal places.

General Format

            FormatPercent (ExpressionToFunction)

Example

            lblPercentComplete.Caption = FormatPercent(sngComplete)

            lblInterestRate.Caption = FormatPrecent(curRate)

Variable

Value

Function

Output

curCorrect

.75

FormatPercent (curCorrect)

75%

curCorrect

.75

FormatPercent (curCorrect, 1)

75.0%

curate

.734

FormatPercent (curRate)

73%

curate

.734

FormatPercent (curRate,1)

73.4%

curate

.734

Formatpercent (curRate, 2)

73.40%

 

iv.The FormatDateTime Function

            To format an expression as a date and/or time.  The expression may be a string that holds a date or time value, a data type variable, or a function that returns a date.  The named formats use your computer’s regional settings.  If you omit the optional named format, the function returns the date using vbGeneralDate.

General Format

            FormatDateTime(ExpressionToFormat [ , NamedFormat ] )

Example

            lblStartDate.Caption = FormatDateTime (dtmStartDate, vbShortDate)

            lblStartTime.Caption = FormatDateTime (“1/100”, vbLongDate)

            lblDateAndTime.Caption = FormatDateTime (dtmSomeDate)

The actual values returned by the FormatDateTime function depend on the regional settings on your computer.  These are the return formats based on the USA defaults.

Named Format

Returns

Example

vbGeneralDate

A date and/or time.  If the expression holds a date, returns a short date.  If it holds a time, returns a long time.  If it holds both, returns both a short date and long time.

2/28/99  6:01:24 PM

vbLongDate

Day of week, Month Day, Year

Sunday, February 28,1999

vbShortDate

MM/DD/YY

2/28/99

vbLongTime

HH:MM:SS AM/PM

6:01:24 PM

vbShortTime

HH:MM (24 hour clock)

18:01

 

CALLING EVENT PROCEDURES

If you wish to perform a set of instructions in more than one location, you don’t have to duplicate the code.  Write the instructions once, in an event procedure, and “call” the procedure from another procedure.  When you call an event procedure, the entire procedure is executed and then execution returns to the statement following the call.

General Format

            [Call] ProcedureName

Example

Sub Clear( )

Text1.text=””

Text2.text=””

Text3.text=””

Text4.text=””

Text5.text=””

End Sub

 

Whenever you want to clear the content of the form, to call the procedure clear

Call Clear ( ) or

Clear ( )


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