change brightness of images in listview

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hello..i have added images in the listview control in thumbnail format...i want to change brightness of the checked images in the listview using trackbar...can someone tell me code for dat ..pls help
thnks

//this is code for looping through the listview and finding out checked images.After this how shud i carry on ?? :confused: //

listView1.LargeImageList = null;
ImageList imglist3 = new ImageList();
imglist3.ColorDepth = ColorDepth.Depth32Bit;

for(int i=0; i<listView1.Items.Count;i++)
{
if(listView1.Items[i].Checked)
{

Posted 18-Jan-10 22:04pm

djsproject

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Christian Graus · Answer 1 · 2010-01-18T23:29:00

You'd be wanting some sort of brightness filter. As you say you're using Linux ( which explains why you use words like 'dat' ), I'm not sure exactly how you'd get direct pixel access, C++ has no knowledge of such things, they depend on the platform you're using. But I'd expect there would be free libraries you could use.