// 创建覆盖表面
ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT;
ddsd.ddsCaps.dwCaps = (capsDrv.dwCaps & DDCAPS_OVERLAY)?DDSCAPS_OVERLAY:DDSCAPS_OFFSCREENPLAIN; // Does the driver support overlays in the current mode? Overlay related APIs will fail without hardware support).
ddsd.dwWidth = 352;
ddsd.dwHeight = 288;
for(i=0;i<nPixelFormat;i++) {
memcpy(&ddsd.ddpfPixelFormat,&PixelFormat[i],sizeof(DDPIXELFORMAT));