编程技巧15法之三[1]

1.         如何替换hbitmap中的颜色值

#define colorref2rgb(color) (color & 0xff00) | ((color >> 16) & 0xff) \

                                             | ((color << 16) & 0xff0000)

hbitmap replacecolor (hbitmap hbmp,colorref coldcolor,colorref cnewcolor)

{

    hbitmap retbmp=null;

    if (hbmp)

    {   

        hdc bufferdc=createcompatibledc(null);       // 源位图dc

        if (bufferdc)

        {

            selectobject(bufferdc,hbmp); 　       // 选入dc中

            hdc directdc=createcompatibledc(null);      // 目标dc

            if (directdc)

            {

                // 获取源位图大小

                bitmap bm;

                getobject(hbmp, sizeof(bm), &bm);