how can I draw into MyGUI::Canvas

Hello everybody!
I have some question about MyGUI::Canvas... How can I draw into Canvas, I need it for drawing some diagrams and statistics..
Everybody who know answer, please help

Canvas create simple texture that you can use as pizel buffer and set pixels of such texture directly:
Here's piece of code from Demo_Colour (generates colour gradient):
void ColourPanel::updateTexture(const MyGUI::Colour& _colour)
{
size_t size = 32;

MyGUI::uint8* pDest = static_cast<MyGUI::uint8*>(mTexture->lock(MyGUI::TextureUsage::Write));

for (size_t j = 0; j < size; j++)
for (size_t i = 0; i < size; i++)
{
float x = (float)i / size;
float y = (float)j / size;
*pDest++ = MyGUI::uint8((1. - y) * (_colour.blue * x + (1. - x)) * 255); // B
*pDest++ = MyGUI::uint8((1. - y) * (_colour.green * x + (1. - x)) * 255); // G
*pDest++ = MyGUI::uint8((1. - y) * (_colour.red * x + (1. - x)) * 255); // R
*pDest++ = 255; // A
}

// Unlock the pixel buffer
mTexture->unlock();
}

Also if you are going to draw graphs. that is actually a line - you can use PolygonalSkin instead (sample in UnitTest_Spline), that let's you draw lines and splines.

O, nice! thank you very much!!!!