PictureBoxCustom (Advanced Picture Box)

PictureBoxCustom includes an advanced Transparency (Alpha Channel) management engine compared to the standard picture box. This feature ensures that semi-transparent shadows and transitions, especially in PNG images, appear seamless.

Advanced Panel: Alpha Management

The most distinguishing feature of this object is the Alpha value. This value manages the opacity (visibility) of the image at the pixel level.

• Alpha Value (0 – 255):
  • 255 (Default – Fully Opaque): The image is in a standard, fully visible state. Semi-transparent pixels are rendered as solid color (this can sometimes cause shadows to appear as black artifacts).
  • 0 (Fully Transparent): The image becomes completely invisible.
  • 1 – 254 (Translucent): The image becomes partially transparent.
• Shadows and Anti-Aliasing

If the image you have loaded (especially in PNG format) contains soft shadows or semi-transparent edges:

1. Set the Alpha value to 1 (or any value less than 255) instead of the default 255.
2. Result: This action activates the special Alpha engine. The image will blend perfectly with the background, displaying shadows and edges exactly as they appear in the original file.

Design Mode Warning

When the Alpha value is set to less than 255, you may observe that the image darkens slightly when you click or select it on the design screen (Editor). This is merely a selection highlight specific to design time; at Runtime, the image will appear correctly with the intended brightness and transparency.