VC对BMP位图图像进行旋转的示例源代码，可以按顺时针、逆时针两种方式旋转，不过测试中发现，如果旋转次数过多的话，好像图像会失真.-VC of BMP bitmap images in the source code examples of rotation can be clockwise, counterclockwise rotation in two ways, but tests found that if the number of over-rotation, then, as i