*pdci | Specifies a far pointer to a DCISURFACEINFO structure which was previously obtained via a DCIDCREATEPRIMARYSURFACE, DCICREATEOFFSCREENSURFACE, or DCICREATEOVERLAYSURFACE escape. |
x | Specifies the rectangle left x coordinate in screen coordinates. |
y | Specifies the rectangle top y coordinate in screen coordinates. |
dx | Specifies the rectangle width. |
dy | Specifies the rectangle height. |