h6. [[OS SWI Calls]] h6(. » [[OS_Word]] h6((. » [[OS_Word 21]] h6(((. » OS_Word 21,0 h2. OS_Word 21,0 h5. (SWI &07) |_<^{width:4em}. Entry | | |<^. R0 |<^. 21 (&15) | |<^. R1 |<^. Pointer to 10-byte [[OS_Word 21_0 Block|block]]| |_<^{width:4em}. Exit | | |<^. R0 |<^. Preserved| |<^. R1 |<^. Preserved| h4. Use The purpose of this call is to define a pointer shape. h4. Notes This OS_Word defines a pointer shape, which may be selected with [[OS_Byte 106]]. Pointers are always defined in 2 bits per pixels, colour 0 is transparent. The shape data is given from top to bottom, with bits 0,1 in each byte giving the left most pixel. Mouse colours can be set with [[VDU 19]]. h4. See also * [[OS_Byte 106]] * [[OS_Word]] * [[OS_Word 21]] * [[OS_Word 21_0 Block|OS_Word 21,0 Block]] * [[VDU 19]]