Below are the types of data you can supply to script routines (as shown in the "prototypes" for each script function).
BOOL
True or False.
Lua type: boolean
boolean
True or False.
Lua type: boolean
BSTR
A character string (eg. "swordfish").
Lua type: string
Strings are stored as "null-terminated". That is, a byte with the value 0 (null) indicates the end of a string. Thus, strings may not contain imbedded null characters.
IDispatch
An object reference.
Lua type: not supported
long
A 32-bit number (from -2147483647 to +2147483647).
Lua type: number
short
A 16-bit number (from -32768 to +32767).
Lua type: number
date
A date/time field.
Lua type: number
VARIANT
A Visual-Basic "variant" data type, which can hold different types of data. A variant can be "null", "empty", or contain a number, character string, or an array, amongst other things. You can use the Visual Basic "VarType" function to find exactly what sort of data is in a variant.
Lua type: any (all variables in Lua can be any type)
void
No return value.
Lua type: nil
The safest way to test for "true" or "false" is to assume that zero (0) is false, and any other value is true.
Similarly, to supply the value "true" simply supply a 1, and to supply the value "false", supply the value 0.
See Also ... Topic 
Scripting
Scripting data types
Scripting functions list
Scripting return codes list
(Help topic: general=data_types)
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