VB6.0颜色渐变代码，生成窗体背景的渐变效果。渐变类型可选：水平渐变，从白色渐变到蓝色，圆形渐变，可设置线型、线宽，从白色渐变到黑色渐变-VB6.0 color gradient code generated form the background gradient effect. Gradient Type Optional: horizontal gradient, gradient from white to blue, round gradient, you can set line, line width, gradient from white to black gradient