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How to make a bitmap transparent?

Posted By:Jean Paul       Posted Date: October 07, 2010    Points: 15    Category: Windows Form Controls    URL: http://www.dotnetspark.com  

This code shows how to make a bitmap transparent

// Create two PictureBoxes and on the first picturebox load a bitmap image

// Keep the second picturebox image empty

Use the following code to see the transparent image on the second picture box:

Bitmap bitmap = new Bitmap(pictureBox1.Image);

bitmap.MakeTransparent(bitmap.GetPixel(1, 1));

pictureBox2.Image = bitmap;




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