Color Custom Cursor in .NET 2.0 C#

[pbernasc]

Does anyone know how to successfully load a custom color (32 bits) cursor in C# (under XP..NET 2.0 - or NET3.0 eventually)?
All I could do using C# .Net support was loading a color cursor but ending up getting it displayed in a black and white. I found an example that manages to display the cursor in color (using GetHIcon) , but I do have a hard time making its background transparent: here is the code that creates the cursor from a image file:

// create any bitmap
Bitmap b = new Bitmap( 250,170 );
Graphics g = Graphics.FromImage ( b );
// do whatever you wish
Image img = Image.FromFile("Image.bmp"));
g.DrawImage(img, 125, 85);
// this is the trick!?
IntPtr ptr = b.GetHicon();
Cursor c = new Cursor( ptr );
// attach cursor to the form
this.Cursor = c;

I have looked all over the web .. sort of ;-) but couldn't find any compelling documentation with an example that works.
Does anyone know how to make the image transparent in the above code?
Or perhaps there is a more elegant way of doing this?
Help is greatly appreciated!
Thank you
Paolo

[EvilPenguin]

// create any bitmap
Bitmap b = new Bitmap( 250,170 );
Graphics g = Graphics.FromImage ( b );
// do whatever you wish
Image img = Image.FromFile("Image.bmp"));
g.DrawImage(img, 125, 85);
// this is the trick!?
IntPtr ptr = b.GetHicon();
Cursor c = new Cursor( ptr );
// attach cursor to the form
this.Cursor = c;

A bit of this code is unneccessary. Bitmap is a subclass of Image, so you can replace the first few lines:
Bitmap b = (Bitmap)Image.FromFile("Image.bmp");
b.MakeTransparent(Color.FromArgb(r, g, b)); //Put the color you want to make transparent here. May not be neccessary if you're loading an already transparent file
IntPtr ptr = b.GetHicon();
Cursor c = new Cursor( ptr );
this.Cursor = c;