func UnmapNamedBuffer(buffer uint32) bool {
	ret, _, _ := syscall.Syscall(gpUnmapNamedBuffer, 1, uintptr(buffer), 0, 0)
	return ret != 0
}
func UnmapNamedBuffer(buffer uint32) bool {
	ret, _, _ := syscall.Syscall(gpUnmapNamedBuffer, 1, uintptr(buffer), 0, 0)
	return ret != 0
}
// release the mapping of a buffer object's data store into the client's address space