Working with External Assemblies

A .NET assembly representing an external assembly is available. A DLL file loaded to the assembly is obtained after compiling the following C# code:

Source DLL.

The following code contains two functions used to calculate roots of quadratic equation. If discriminant value is negative, the functions return fixed value 1.#QNAN.

using System;

namespace UserFunc

{

public class UserClass

{

double Descr (int a,int b,int c)

{

return b*b - 4*a*c;

}

public double X1(int a, int b, int c)

{

double d;

d = Descr(a,b,c);

if (d > 0)

return (-b-Math.Sqrt(d))/(2*a);

else

return double.NaN;

}

public double X2(int a, int b, int c)

{

double d;

d = Descr(a, b, c);

if (d > 0)

return (-b+Math.Sqrt(d))/(2*a);

else

return double.NaN;

}

In the custom .NET assembly, connect the obtained external assembly using the Repository Assemblies tab. After this you can use external assembly resources.

Example 1

Sub Main;
Var
    f: UserFunc.UserClass = New UserFunc.UserClass;
    x1, x2: Double;
Begin
    x1 := f.x1(1, 2, 3);
    x2 := f.x2(1, 2, 3);
End Sub Main;

Example 2

Imports UserFunc;
Sub Main;
Var
    f: UserClass = New UserClass;
    x1, x2: Double;
Begin
    x1 := f.x1(1, 2, 3);
    x2 := f.x2(1, 2, 3);
End Sub Main;

Working with External Assemblies

General Information

Description

Example 1

Example 2