Visual C++ PaintEventArgs

[rudy01]

Hi everyone,
I followed the example on MSDN, which was very helpful (http://msdn.microsoft.com/en-us/libr...eventargs.aspx).

However, the problem that I have is that I don't know how to reuse PaintEventArgs over again!

Once I assigned the "Form" Appearance in its property to have Paint Appearance, then I got the following appeared in my code
private: void Form1_Paint(System::Object ^ sender, System::Windows::Forms::PaintEventArgs ^ pe)

And when I followed the example listed on the above link I got it to work.
But now, I want to define an internal function that keeps doing more stuff, and I did something like this:
I defined this at a global level:
Private: System::Windows::Forms::PaintEventArgs my_pe

And inside the "Form1_paint" function, I added the following line: my_pe = pe

And then I defined a separate function

private: void draw_line(double long x, double long y, System::Object ^ sender, System::Windows::Forms::PaintEventArgs ^ pe){
Pen^ greenPen = gcnew Pen(Color::Green);
Point startPoint;
Point endPoint;

startPoint= Point(20+x, 50+x);
endPoint = Point(200+y, 300+y);
pe->Graphics->DrawLine( greenPen, startPoint, endPoint);
}

And somewhere else in the code, I am calling the following:

draw_line(100, 100, sender, my_pe);

But I get a run time error and doesn't understand (my_pe->Graphics)???


Can someone please help and tell me how can I actually reuse the PaintEventArgs, such that I can keep calling different function that do different drawings?

I really appreciate,

--Rudy