使用双缓冲机制(Double buffering)来解决屏幕的闪烁现象-use double buffering mechanism (Double buffering) to resolve the scintillation screen phenomenon

使用vc双缓冲绘图，避免闪烁，在别处看到的，感觉很不错，发出来与大家共享。-vc-use graphics buffer to avoid flicker, see elsewhere, I feel very good, and sent share.