Hello,

I was wondering if there is any way to have a certain picture in a picturebox that isn't a square form, like for example acat but instead of having the background white, I want it to be transparant is that possible?

What I mean is this: http://img185.imageshack.us/my.php?image=project7ma8.jpg

Thanks in advance,

Ruben Pieters

Now that I'm here I can answer your question as well. What I did is I loaded the picture in a bitmap first and then replaced the white color with a transparant one. After that I placed the bitmap in the picturebox in the onpaint event of the picturebox
So the whole source looks like this:

private Bitmap waitingIcon;

/// <summary>OnLoad of the form. Show progress animation</summary>
private void WaitingSplash_Load(object sender, EventArgs e)
{
pictureBoxWaiting.Paint += new PaintEventHandler(pictureBoxWaiting_Paint);
waitingIcon = Resources.WaitingIcon;
pictureBoxWaiting.BackColor = BackColor;
}

/// <summary>Paints the PictureBox</summary>
private void pictureBoxWaiting_Paint(object sender, PaintEventArgs e)
{
using (Bitmap waitImageTmp = new Bitmap(waitingIcon, waitingIcon.Width, waitingIcon.Width))
{
waitImageTmp.MakeTransparent(Color.White);
e.Graphics.Clear(pictureBoxWaiting.BackColor);
e.Graphics.DrawImage(waitImageTmp, new Point(0, 0));
}
}

Hope it's usefull

Try this:

http://msdn2.microsoft.com/en-us/library/system.drawing.bitmap.maketransparent.aspx

waitImageTmp.MakeTransparent(Color.White);

Btw. making a imagecolour transparant can affect the performance, because it actually picks up the color of the parent control and paint it on the top control. Also note that it will make all white pixels transparant and not only those on background behind the cat. Otherwise you will need more advanced bitmap techniques.

I've searched a bit and found that .gifs can be created with a transparent background, so I'll use that.

Thanks for answering anyway!

Now that I'm here I can answer your question as well. What I did is I loaded the picture in a bitmap first and then replaced the white color with a transparant one. After that I placed the bitmap in the picturebox in the onpaint event of the picturebox
So the whole source looks like this:

private Bitmap waitingIcon;

/// <summary>OnLoad of the form. Show progress animation</summary>
private void WaitingSplash_Load(object sender, EventArgs e)
{
pictureBoxWaiting.Paint += new PaintEventHandler(pictureBoxWaiting_Paint);
waitingIcon = Resources.WaitingIcon;
pictureBoxWaiting.BackColor = BackColor;
}

/// <summary>Paints the PictureBox</summary>
private void pictureBoxWaiting_Paint(object sender, PaintEventArgs e)
{
using (Bitmap waitImageTmp = new Bitmap(waitingIcon, waitingIcon.Width, waitingIcon.Width))
{
waitImageTmp.MakeTransparent(Color.White);
e.Graphics.Clear(pictureBoxWaiting.BackColor);
e.Graphics.DrawImage(waitImageTmp, new Point(0, 0));
}
}

Hope it's usefull

Looks good too, will check it out.