Question

I realise this might be hard to explain, so let me start by using an example from Windows; keBugCheckEx().

How would I go about making a method that is contained within one program but, when executed from another, affect the program it is in. For example, in the main program, you could have:

public static void Panic(uint errCode)
{
    System.Windows.MessageBox.Show("Function Panic() was called with error code: "
        + errCode);
    Application.Exit();
}

And then, in the second program, you could call that method, e.g.

public static void Main(string[] args)
{
    Foo.Panic(0x3C);
}

How would I go about making it so that, instead of the MessageBox showing in the second program, it appears in the first program? Sorry if this is not very well explained.

Answer 1

You mention two separate “programs”. Do you mean two separate executables? I think what you mean is you would have a project that is more of a class library that encapsulates certain functions / validations. You refer to “Foo” but no other declaration… is it a second project within your overall application “Solution” and included as part of the main with #using. Secondary class libraries SHOULD be able to do a simple messagebox as long as its called from within the overall main UI thread.

You might need to elaborate a bit more / update your question.

I guess the final solution was the feedback comment to have the class just have a method within the class that does nothing but pass a string message BACK to the calling source. From that, any application calling it can get the message and display it within their own UI thread.