VBScript Programmer's Reference, Third Edition

Appendix B. Variable Naming Convention

Because variables are used to hold values, it makes sense to choose names for them that describe their purpose or what they contain. The bigger the project you are working on is, the more important it is to keep track of its variables. This appendix offers some things to keep in mind, including standards:

• You'll want to keep your naming consistent. For example if you use Cnt as a variable in one part of the script and Count in another when you are in fact dealing with the same data, you're very likely to introduce runtime errors by confusing the variables.

• It is useful to include the scope of a variable by prefixing it with g for global, or l for local (to a subprocedure), such as gstrCompanyName and lstrDepartmentName.

• One of the best ways to organize variable names is to prefix all variable names you use with a shorthand representation of the data type that the variable will hold. The standard prefixes used to accomplish this are called Hungarian notation.

Following is a listing of data types and their associated Hungarian prefixes, complete with examples of use.

Data Type	Hungarian Prefix	Example	VarType()
Boolean	bln (or bool)	BlnValid	11
Byte	Byt	bytColor	17
Currency	Cur	CurTotal	6
Date or Time	Dtm	dtmMember	7
Double	Dbl	DblTotal	5
Error	Err	errInvalidEmailAddress	10
Integer	Int	intCount	2
Long	Lng	lngHeight	3
Object	Obj	ObjWS	9 or 13
Single	Sng	sngWidth	4
String	Str	strName	8
Variant	Var	varNumber	12

Following is a listing of control types and their associated Hungarian prefixes, complete with ...