Documentation

Visual Basic users can install the functions much simpler. Just paste the following lines into your Visual Basic source file:

Declare Function CreatePair Lib "VSPDCTL.DLL" (ByVal Port1$, ByVal Port2$) As Boolean
Declare Function DeletePair Lib "VSPDCTL.DLL" (ByVal Port$) As Boolean
Declare Function DeleteAll Lib "VSPDCTL.DLL" () As Boolean
Declare Function SetStrictBaudrateName Lib "VSPDCTL.DLL" (ByVal Port$, ByVal StrictBaudrate As Boolean) As Boolean
Declare Function SetStrictBaudrateHandle Lib "VSPDCTL.DLL" (ByVal Handle As Long, ByVal StrictBaudrate As Boolean) As Boolean
Declare Function CreatePair Lib "VSPDCTL.DLL" (ByVal Port1$, ByVal Port2$) As Boolean
Declare Function DeletePair Lib "VSPDCTL.DLL" (ByVal Port$) As Boolean
Declare Function DeleteAll Lib "VSPDCTL.DLL" () As Boolean
Declare Function SetStrictBaudrate Lib "VSPDCTL.DLL" (ByVal Port$, ByVal StrictBaudrate As Boolean) As Boolean
Declare Function SetBreak Lib "VSPDCTL.DLL" (ByVal Port$, ByVal bBreak As Boolean) As Boolean
Declare Function QueryBus Lib "VSPDCTL.DLL" (ByVal InBuffer As String, sizeInBuffer As Long, ByVal OutBuffer As String, sizeOutBuffer As Long) As Boolean
Declare Function SetWiring Lib "VSPDCTL.DLL" (ByVal Port1$, ByVal Buffer As String, sizeBuffer As Long) As Boolean

Put VSPDCTL.DLL in your program's directory. Now you can call function directly.