Converting - Explicit

All explicit data type conversion must be done using a Data Type Conversion Function.
All the conversion functions can automatically handle locale issues.
That means that they will take international date/time and number regional settings into account.

CBOOL	Returns the expression converted to a boolean data type (Boolean). Converts any valid string or numeric expression to a boolean.
CBYTE	Returns the expression converted to a byte data type (Byte). Converts numeric expressions 0-255 to Byte. Rounds fractional parts.
CCUR	Returns the expression converted to a currency data type (Currency).
CDATE	Returns the expression converted to a date data type (Date). Converts any valid date or time representations to the Date type.
CDBL	Returns the expression converted to a double data type (Double). Converts any expression that can be evaluated as a number to a Double (assuming it is in the range of a Double).
CDEC	Returns the expression converted to a variant/decimal subtype (Variant). Converts any expression that can be evaluated as a number to a Decimal.
CINT	Returns the expression converted to an integer data type (Integer). Converts any expression that can be evaluated as a number to an Integer. Rounds fractional parts.
CLNG	Returns the expression converted to a long data type (Long). Converts any expression that can be evaluated as a number to a Decimal.
CLNGLNG	Returns the expression converted to a long data type (64 bit only) (Long). Converts any expression that can be evaluated as a number to a Decimal.
CLNGPTR	Returns the expression converted to a longptr data type.
CSNG	Returns the expression converted to a single data type (Single).
CSTR	Returns the expression converted to a string data type (String).
CVAR	Returns the expression converted to a variant data type (Variant).
CVDATE	Returns the expression converted to a variant/date subtype (Variant).
CVERR	Returns the corresponding to a given error number (Variant).

Backwards Compatibility - STR

The STR is only included for backwards compatibility and should not to used.
This function returns the text string of a number (String).
STR is globally fixed. It only recognizes the dot (.) as a decimal separator, regardless of the user's computer settings.
CSTR is internationally aware. It looks at the user's Windows regional settings. If your user is in Europe and uses commas for decimals, CStr will output a comma.

Dim resultStr As String 
Dim resultCStr As String 

resultStr  = Str(10)   ' Returns " 10"  (Notice the leading space!)  
resultCStr = CStr(10)  ' Returns "10"   (No space)  
resultStr  = Str(-10)  ' Returns "-10"  (No leading space)

Not Available

CCHAR	This is not available in VBA, only VB.Net
COBJ	This is not available in VBA, only VB.Net
CSBYTE	This is not available in VBA, only VB.Net
CSHORT	This is not available in VBA, only VB.Net
CType	This is not available in VBA, only VB.Net
DirectCast	This is not available in VBA, only VB.Net
TryCast	This is not available in VBA, only VB.Net