Each parameter for the function has a specified type. Parameter types are listed in the table which follows.

Type

Description

VOID

Not supported.

CHAR

The first character of the BASIC+ string is passed to the DLL.

BYTE

A 1 byte signed integer is passed to the DLL.

UBYTE

A 1 byte unsigned integer is passed to the DLL.

SHORT

A 2 byte signed integer is passed to the DLL.

USHORT

A 2 byte unsigned integer is passed to the DLL.

LONG

A 4 byte signed integer is passed to the DLL.

ULONG

Not supported.

FLOAT

A 4 byte floating point value is passed to the DLL.

DOUBLE

An 8 byte floating point value is passed to the DLL.

LPVOID

A 4 byte value is passed to the DLL. It is the responsibility of the programmer to ensure that this value is a valid far pointer.

Note: This value can be the value returned from a DLL function returning LPVOID, or the value returned from GetPointer().

LPCHAR

A far pointer is passed to the OpenInsight string.

Note: If the DLL is expecting a pointer to a null-terminated string, then concatenate Char(0) to the end of the string.

LPBYTE

A far pointer to a 1 byte signed integer is passed to the DLL.

LPUBYTE

A far pointer to a 1 byte unsigned integer is passed to the DLL.

LPSHORT

A far pointer to a 2 byte signed integer is passed to the DLL.

LPUSHORT

A far pointer to a 2 byte unsigned integer is passed to the DLL.

LPLONG

A far pointer to a 4 byte signed integer is passed to the DLL.

LPULONG

Not supported.

LPFLOAT

Not supported.

LPDOUBLE

A far pointer to an 8 byte floating point value is passed to the DLL.