Paint events & Properties in windows Application

Trigger the Paint event in System Drawing? Invalidate the current form; the OS will take care of repainting. The Update method forces the repaint.
With these events, why wouldn’t Microsoft combine Invalidate and Paint, so that you wouldn’t have to tell it to repaint, and then to force it to repaint? Painting is the slowest thing the OS does, so usually telling it to repaint, but not forcing it allows for the process to take place in the background

Assign an RGB color to a System.Drawing.Color object? Call the static method FromArgb of this class and pass it the RGB values.