Hello

To get an understanding of UI threads in C++/CLI, I attempted to
duplicate the following C# example:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnforms/html/wi
nforms06112002.asp

Here is the code:

public ref class Form1 : public System::Windows::Forms::Form
{
..
...
...
...
private: System::Void button1_Click(System::Object^  sender,
System::EventArgs^  e)
{
    CalcPiDelegate  ^calcPi = gcnew CalcPiDelegate(this, &Form1::calcPi);
    calcPi->BeginInvoke(1, nullptr, nullptr);

}

private: delegate System::Void CalcPiDelegate(int max);

private: System::Void calcPi(int max)
{
                ShowProgress(0, max);

                for (int i = 0; i < max; i++)
                {
                    ShowProgress(i, max);
                }
}

private: delegate System::Void ShowProgressDelegate(int i, int max);

private: System::Void ShowProgress(int i, int max)
{
    if (richTextBox1->InvokeRequired == false)
    {
                   
                richTextBox1->AppendText(Convert::String(i) +
Environment::NewLine);
        progressBar1->Maximum = max;
           progressBar1->Value = i;
    }
    else
    {
        ShowProgressDelegate ^progDelegate = gcnew
ShowProgressDelegate(this,&Form1::ShowProgress);

        cli::array<int> ^args = gcnew cli::array<int>(2);
        args[0] = i;
        args[1]= max;

        BeginInvoke(progDelegate,args);
    }
}
};

The BeginInvoke call causes the following exception:

An unhandled exception of type
'System.Reflection.TargetParameterCountException' occurred in mscorlib.dll

Additional information: Parameter count mismatch.

Unfortunately I can not determine why this error occurs. Any help or
hint is greatly appreciated.

Regards