[C#] Transparency Problem

[Moy]

I have a Transparency Problem.

Okay first I've created a form. Then I've set it's background color to transparent by using this code.


this.BackColor = Color.Magenta;
this.TransparencyKey = Color.Magenta;

Then, I've set this image as the Background Image:

And this is the result.

Result

The Problem:
As you can see, there are parts that has magenta. I want it to be removed. Btw, I'm achieving a splashscreen like what Adobe Photoshop has.

 

[Moy]

I'll close this as problem solved by not continuing my plan.