How to set the transparency for a image

Hi

iam reading and writing and GIF image,when i resize the new image

the transparency of the old image is not applied to the new one it appears black as background. so i need to set the transparency of the old image to the new GIF image . so is there any function to set the tranparency or any sample code....

regards mano

[347 byte] By [mnrnjn_ranjana] at [2007-11-27 8:59:09]