说明：GraphicEx.pas文件使得TImage支持30多种图象格式，有TIFF images(*.tif *.tiff), SGI images(*.bw, *.rgb, *.rgba, *.sgi), ZSoft Paintbrush images(*.pcx, *.pcc), Kodak Photo-CD images(*.pcd), CompuServe images(*.gif), Photoshop images(*.psd, *.pdd), Paintshop Pro imag