Invoking Excel Functions in VBA Instructions

If a VBA function that's equivalent to one you use in Excel is not available, you can use Excel's worksheet functions directly in your VBA code. Just precede the function with a reference to the WorksheetFunction object. For example, VBA does not have a function to convert radians to degrees. Because Excel has a worksheet function for this procedure, you can use a VBA instruction such as the following:

 Deg = Application.WorksheetFunction.Degrees(3.14) 

The WorksheetFunction object was introduced in Excel 97. For compatibility with earlier versions of Excel, you can omit the reference to the WorksheetFunction object and write an instruction such as the following:

 Deg = Application.Degrees(3.14) 

Note  

There are no new VBA functions in Excel 2007.

Table B-2: SUMMARY OF VBA FUNCTIONS
Open table as spreadsheet

Function	Action
Abs	Returns the absolute value of a number
Array	Returns a variant containing an array
Asc	Converts the first character of a string to its ASCII value
Atn	Returns the arctangent of a number
CallByName	Executes a method, or sets or returns a property of an object
CBool	Converts an expression to a Boolean data type
CByte	Converts an expression to a Byte data type
CCur	Converts an expression to a Currency data type
CDate	Converts an expression to a Date data type
CDbl	Converts an expression to a Double data type
CDec	Converts an expression to a Decimal data type
Choose	Selects and returns a value from a list of arguments
Chr	Converts a character code to a string
CInt	Converts an expression to an Integer data type
CLng	Converts an expression to a Long data type
Cos	Returns the cosine of a number
CreateObject	Creates an Object Linking and Embedding (OLE) Automation object
CSng	Converts an expression to a Single data type
CStr	Converts an expression to a String data type
CurDir	Returns the current path
CVar	Converts an expression to a variant data type
CVDate	Converts an expression to a Date data type (for compatibility, not recommended)
CVErr	Returns a user -defined error value that corresponds to an error number
Date	Returns the current system date
DateAdd	Adds a time interval to a date
DateDiff	Returns the time interval between two dates
DatePart	Returns a specified part of a date
DateSerial	Converts a date to a serial number
DateValue	Converts a string to a date
Day	Returns the day of the month of a date
DDB	Returns the depreciation of an asset
Dir	Returns the name of a file or directory that matches a pattern
DoEvents	Yields execution so the operating system can process other events
Environ	Returns an operating environment string
EOF	Returns True if the end of a text file has been reached
Error	Returns the error message that corresponds to an error number
Exp	Returns the base of natural logarithms (e) raised to a power
FileAttr	Returns the file mode for a text file
FileDateTime	Returns the date and time when a file was last modified
FileLen	Returns the number of bytes in a file
Filter	Returns a subset of a string array, filtered
Fix	Returns the integer portion of a number
Format	Displays an expression in a particular format
FormatCurrency	Returns an expression formatted with the system currency symbol
FormatDateTime	Returns an expression formatted as a date or time
FormatNumber	Returns an expression formatted as a number
FormatPercent	Returns an expression formatted as a percentage
FreeFile	Returns the next available file number when working with text files
FV	Returns the future value of an annuity
GetAllSettings	Returns a list of settings and values from the Windows Registry

Table B-2: SUMMARY OF VBA FUNCTIONS
Open table as spreadsheet

Function	Action
GetAttr	Returns a code representing a file attribute
GetObject	Retrieves an OLE Automation object from a file
GetSetting	Returns a specific setting from the application's entry in the Windows Registry
Hex	Converts from decimal to hexadecimal
Hour	Returns the hour of a time
IIf	Evaluates an expression and returns one of two parts
Input	Returns characters from a sequential text file
InputBox	Displays a box to prompt a user for input
InStr	Returns the position of a string within another string
InStrRev	Returns the position of a string within another string from the end of the string
Int	Returns the integer portion of a number
IPmt	Returns the interest payment for a given period of an annuity
IRR	Returns the internal rate of return for a series of cash flows
IsArray	Returns True if a variable is an array
IsDate	Returns True if a variable is a date
IsEmpty	Returns True if a variable has not been initialized
IsError	Returns True if an expression is an error value
IsMissing	Returns True if an optional argument was not passed to a procedure
IsNull	Returns True if an expression contains a Null value
IsNumeric	Returns True if an expression can be evaluated as a number
IsObject	Returns True if an expression references an OLE Automation object
Join	Combines strings contained in an array
LBound	Returns the smallest subscript for a dimension of an array
LCase	Returns a string converted to lowercase
Left	Returns a specified number of characters from the left of a string
Len	Returns the number of characters in a string
Loc	Returns the current read or write position of a text file
LOF	Returns the number of bytes in an open text file
Log	Returns the natural logarithm of a number
LTrim	Returns a copy of a string with no leading spaces
Mid	Returns a specified number of characters from a string
Minute	Returns the minute of a time
MIRR	Returns the modified internal rate of return for a series of periodic cash flows
Month	Returns the month of a date as a number
MonthName	Returns the month of a date as a string
MsgBox	Displays a modal message box
Now	Returns the current system date and time
NPer	Returns the number of periods for an annuity
NPV	Returns the net present value of an investment
Oct	Converts from decimal to octal
Partition	Returns a string representing a range in which a value falls
Pmt	Returns a payment amount for an annuity
Ppmt	Returns the principal payment amount for an annuity
PV	Returns the present value of an annuity
QBColor	Returns a red/green/blue (RGB) color code
Rate	Returns the interest rate per period for an annuity
Replace	Returns a string in which a substring is replaced with another string
RGB	Returns a number representing an RGB color value
Right	Returns a specified number of characters from the right of a string
Rnd	Returns a random number between 0 and 1
Round	Returns a rounded number
RTrim	Returns a copy of a string with no trailing spaces
Second	Returns the seconds portion of a specified time