.dll function in code

[MetLife]

Hi,

I received a model with some strange function declarations. Does anyone know what this type of declaration is supposed to do?

Declare Function closesession Lib "vpmsdl32.dll" (ByVal Session As Integer) As IntegerDeclare Function opensession Lib "vpmsdl32.dll" () As Integer
Declare Function loadsession Lib "vpmsdl32.dll" (ByVal FileName As String) As Integer
Declare Function choice Lib "vpmsdl32.dll" (ByVal Session As Integer, _
                                            ByRef name As String, _
                                            ByRef fieldname As String, _
                                            ByRef Result As String, _
                                            ByVal reslen As Integer, _
                                            ByRef Message As String, _
                                            ByVal msglen As Integer, _
                                            ByRef field As String, _
                                            ByVal fldlen As Integer) As Integer


Declare Function available Lib "vpmsdl32.dll" (ByVal Session As Integer, _
                                               ByRef name As String, _
                                               ByRef fieldname As String, _
                                               ByRef Message As String, _
                                               ByVal msglen As Integer, _
                                               ByRef field As String, _
                                               ByVal fldlen As Integer) As Integer


Declare Function compute Lib "vpmsdl32.dll" (ByVal Session As Integer, _
                                            ByVal name As String, _
                                            ByVal Result As String, _
                                            ByVal reslen As Integer, _
                                            ByVal Message As String, _
                                            ByVal msglen As Integer, _
                                            ByVal field As String, _
                                            ByVal fldlen As Integer) As Integer

 

[RoryA]

They are API calls to an external library - apparently something called VP/MS Designer.