Installation package of the WSP be contained with the source code of program, similar as WSP Calculator. This source code for Microsoft Visual Basic 6.0 (Professional Edition). So this program named WSP Calculator (Visual Basic), unlike WSP Calculator, which written in Visual C++.
For using WSP Calculator (Visual Basic) it is necessary to compile project "WSP.vbp" with using Microsoft Visual Basic 6.0.
The adjustment of WSP Calculator (Visual Basic) described in "Adjustment WSP Calculator (Visual Basic)".