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+--------+-------------------------+-------------------------+--------+--------+
|00000000| 0d 00 0a 48 f4 20 50 72 | 6f 63 65 64 75 72 65 20 |...H. Pr|ocedure |
|00000010| 74 6f 20 73 68 6f 77 20 | 68 6f 77 20 61 6e 20 41 |to show |how an A|
|00000020| 70 70 6c 69 63 61 74 69 | 6f 6e 20 74 61 73 6b 20 |pplicati|on task |
|00000030| 63 61 6e 20 68 61 76 65 | 20 61 6e 20 52 65 64 20 |can have| an Red |
|00000040| 6d 6f 76 65 61 62 6c 65 | 0d 00 14 36 f4 20 53 6c |moveable|...6. Sl|
|00000050| 6f 74 20 73 69 7a 65 20 | 69 6e 64 69 63 61 74 6f |ot size |indicato|
|00000060| 72 20 69 6e 20 74 68 65 | 20 74 61 73 6b 20 6d 61 |r in the| task ma|
|00000070| 6e 61 67 65 72 20 64 69 | 73 70 6c 61 79 2e 0d 00 |nager di|splay...|
|00000080| 1e 04 0d 00 28 4a f4 20 | 49 6e 20 79 6f 75 72 20 |....(J. |In your |
|00000090| 70 72 6f 63 65 64 75 72 | 65 20 74 68 61 74 20 72 |procedur|e that r|
|000000a0| 65 63 65 69 76 65 73 20 | 6d 65 73 73 61 67 65 73 |eceives |messages|
|000000b0| 20 66 72 6f 6d 20 74 68 | 65 20 57 69 6d 70 5f 50 | from th|e Wimp_P|
|000000c0| 6f 6c 6c 2c 20 69 6e 63 | 6c 75 64 65 0d 00 32 19 |oll, inc|lude..2.|
|000000d0| f4 20 74 68 65 20 66 6f | 6c 6c 6f 77 69 6e 67 20 |. the fo|llowing |
|000000e0| 6c 69 6e 65 3a 0d 00 3c | 04 0d 00 46 1b c9 20 26 |line:..<|...F.. &|
|000000f0| 34 30 30 43 35 3a f2 73 | 6c 6f 74 73 69 7a 65 28 |400C5:.s|lotsize(|
|00000100| 70 71 25 29 0d 00 50 04 | 0d 00 5a 04 0d 00 64 04 |pq%)..P.|..Z...d.|
|00000110| 0d 00 6e 15 dd 20 f2 73 | 6c 6f 74 73 69 7a 65 28 |..n.. .s|lotsize(|
|00000120| 73 73 71 25 29 0d 00 78 | 07 03 16 04 0d 00 82 4c |ssq%)..x|.......L|
|00000130| f4 20 57 68 65 6e 20 61 | 20 4d 65 73 73 61 67 65 |. When a| Message|
|00000140| 5f 53 65 74 53 6c 6f 74 | 20 69 73 20 72 65 63 65 |_SetSlot| is rece|
|00000150| 69 76 65 64 2c 20 77 65 | 20 67 65 74 20 66 6f 75 |ived, we| get fou|
|00000160| 72 20 70 69 65 63 65 73 | 20 6f 66 20 75 73 65 66 |r pieces| of usef|
|00000170| 75 6c 20 69 6e 66 6f 3a | 0d 00 8c 04 0d 00 96 33 |ul info:|.......3|
|00000180| 74 61 73 6b 6d 61 6e 25 | 3d 73 73 71 25 21 34 20 |taskman%|=ssq%!4 |
|00000190| 20 20 20 20 20 20 3a f4 | 20 74 68 65 20 53 77 69 |      :.| the Swi|
|000001a0| 74 63 68 65 72 27 73 20 | 74 61 73 6b 20 69 64 0d |tcher's |task id.|
|000001b0| 00 a0 2b 6d 65 73 73 5f | 69 64 25 3d 73 73 71 25 |..+mess_|id%=ssq%|
|000001c0| 21 38 20 20 20 20 20 20 | 20 3a f4 20 74 68 65 20 |!8      | :. the |
|000001d0| 6d 65 73 73 61 67 65 20 | 69 64 0d 00 aa 40 63 75 |message |id...@cu|
|000001e0| 72 5f 73 6c 6f 74 25 3d | 73 73 71 25 21 32 30 20 |r_slot%=|ssq%!20 |
|000001f0| 20 20 20 20 3a f4 20 74 | 68 65 20 73 6c 6f 74 20 |    :. t|he slot |
|00000200| 73 69 7a 65 20 62 65 69 | 6e 67 20 73 75 67 67 65 |size bei|ng sugge|
|00000210| 73 74 65 64 20 74 6f 20 | 75 73 0d 00 b4 4b 69 73 |sted to |us...Kis|
|00000220| 5f 69 74 5f 6d 65 25 3d | 73 73 71 25 21 32 34 20 |_it_me%=|ssq%!24 |
|00000230| 20 20 20 20 3a f4 20 74 | 68 65 20 74 61 73 6b 20 |    :. t|he task |
|00000240| 69 64 20 6f 66 20 74 68 | 65 20 74 61 73 6b 20 74 |id of th|e task t|
|00000250| 6f 20 72 65 63 65 69 76 | 65 20 74 68 65 20 6d 65 |o receiv|e the me|
|00000260| 73 73 61 67 65 0d 00 be | 04 0d 00 c8 2e f4 20 57 |ssage...|...... W|
|00000270| 65 20 6f 6e 6c 79 20 72 | 65 73 70 6f 6e 64 20 69 |e only r|espond i|
|00000280| 66 20 74 68 65 20 6d 65 | 73 73 61 67 65 20 69 73 |f the me|ssage is|
|00000290| 20 66 6f 72 20 75 73 0d | 00 d2 04 0d 00 dc 1a e7 | for us.|........|
|000002a0| 20 69 73 5f 69 74 5f 6d | 65 25 3d 6f 75 72 74 61 | is_it_m|e%=ourta|
|000002b0| 73 6b 25 20 8c 0d 00 e6 | 04 0d 00 f0 4b f4 20 57 |sk% ....|....K. W|
|000002c0| 65 20 6d 75 73 74 20 66 | 69 72 73 74 20 63 68 65 |e must f|irst che|
|000002d0| 63 6b 20 74 68 65 20 73 | 6c 6f 74 20 73 69 7a 65 |ck the s|lot size|
|000002e0| 20 74 68 65 20 53 77 69 | 74 63 68 65 72 20 69 73 | the Swi|tcher is|
|000002f0| 20 74 72 79 69 6e 67 20 | 74 6f 20 6f 66 66 65 72 | trying |to offer|
|00000300| 20 75 73 2e 0d 00 fa 4a | f4 20 49 66 20 69 74 20 | us....J|. If it |
|00000310| 69 73 20 74 6f 6f 20 73 | 6d 61 6c 6c 20 66 6f 72 |is too s|mall for|
|00000320| 20 75 73 20 74 6f 20 73 | 75 72 76 69 76 65 2c 20 | us to s|urvive, |
|00000330| 77 65 20 6d 75 73 74 20 | 69 67 6e 6f 72 65 20 74 |we must |ignore t|
|00000340| 68 65 20 73 75 67 67 65 | 73 74 69 6f 6e 2e 0d 01 |he sugge|stion...|
|00000350| 04 48 f4 20 49 66 20 69 | 74 20 69 73 20 61 20 76 |.H. If i|t is a v|
|00000360| 61 6c 69 64 20 73 69 7a | 65 2c 20 77 65 20 63 61 |alid siz|e, we ca|
|00000370| 6c 6c 20 57 69 6d 70 5f | 53 65 74 53 6c 6f 74 20 |ll Wimp_|SetSlot |
|00000380| 74 6f 20 73 65 74 20 74 | 68 65 20 73 6c 6f 74 20 |to set t|he slot |
|00000390| 74 6f 20 74 68 65 0d 01 | 0e 16 f4 20 73 75 67 67 |to the..|... sugg|
|000003a0| 65 73 74 65 64 20 76 61 | 6c 75 65 2e 0d 01 18 04 |ested va|lue.....|
|000003b0| 0d 01 22 1a e7 20 63 75 | 72 5f 73 6c 6f 74 25 3e |..".. cu|r_slot%>|
|000003c0| 3d 32 34 2a 31 30 32 34 | 20 8c 0d 01 2c 21 c8 99 |=24*1024| ...,!..|
|000003d0| 22 57 69 6d 70 5f 53 65 | 74 53 6c 6f 74 22 2c 63 |"Wimp_Se|tSlot",c|
|000003e0| 75 72 5f 73 6c 6f 74 25 | 2c 2d 31 0d 01 36 05 cd |ur_slot%|,-1..6..|
|000003f0| 0d 01 40 04 0d 01 4a 44 | f4 20 41 20 73 70 65 63 |..@...JD|. A spec|
|00000400| 69 61 6c 20 63 61 73 65 | 20 69 73 20 74 68 65 20 |ial case| is the |
|00000410| 4d 65 73 73 61 67 65 5f | 53 65 74 53 6c 6f 74 20 |Message_|SetSlot |
|00000420| 73 65 6e 74 20 77 68 65 | 6e 20 77 65 20 69 6e 69 |sent whe|n we ini|
|00000430| 74 69 61 6c 69 73 65 2e | 0d 01 54 4a f4 20 54 68 |tialise.|..TJ. Th|
|00000440| 69 73 20 61 74 74 65 6d | 70 74 73 20 74 6f 20 73 |is attem|pts to s|
|00000450| 65 74 20 6f 75 72 20 73 | 6c 6f 74 20 74 6f 20 2d |et our s|lot to -|
|00000460| 31 20 62 79 74 65 73 21 | 20 49 6e 73 74 65 61 64 |1 bytes!| Instead|
|00000470| 20 6f 66 20 69 67 6e 6f | 72 69 6e 67 20 74 68 69 | of igno|ring thi|
|00000480| 73 2c 0d 01 5e 44 f4 20 | 77 65 20 63 61 6c 6c 20 |s,..^D. |we call |
|00000490| 57 69 6d 70 5f 53 65 74 | 53 6c 6f 74 20 74 6f 20 |Wimp_Set|Slot to |
|000004a0| 73 65 74 20 74 68 65 20 | 73 6c 6f 74 20 74 6f 20 |set the |slot to |
|000004b0| 6f 75 72 20 64 65 66 61 | 75 6c 74 20 73 6c 6f 74 |our defa|ult slot|
|000004c0| 20 73 69 7a 65 2e 0d 01 | 68 04 0d 01 72 14 e7 20 | size...|h...r.. |
|000004d0| 63 75 72 5f 73 6c 6f 74 | 25 3d 2d 31 20 8c 0d 01 |cur_slot|%=-1 ...|
|000004e0| 7c 1f c8 99 22 57 69 6d | 70 5f 53 65 74 53 6c 6f ||..."Wim|p_SetSlo|
|000004f0| 74 22 2c 32 34 2a 31 30 | 32 34 2c 2d 31 0d 01 86 |t",24*10|24,-1...|
|00000500| 05 cd 0d 01 90 04 0d 01 | 9a 46 f4 20 46 69 6e 61 |........|.F. Fina|
|00000510| 6c 6c 79 2c 20 77 65 20 | 4d 55 53 54 20 61 63 6b |lly, we |MUST ack|
|00000520| 6e 6f 77 6c 65 64 67 65 | 20 74 68 65 20 4d 65 73 |nowledge| the Mes|
|00000530| 73 61 67 65 5f 53 65 74 | 53 6c 6f 74 2c 20 62 79 |sage_Set|Slot, by|
|00000540| 20 73 65 6e 64 69 6e 67 | 20 74 68 65 0d 01 a4 44 | sending| the...D|
|00000550| f4 20 6d 65 73 73 61 67 | 65 20 62 61 63 6b 20 74 |. messag|e back t|
|00000560| 6f 20 74 68 65 20 53 77 | 69 74 63 68 65 72 2e 20 |o the Sw|itcher. |
|00000570| 49 66 20 77 65 20 45 56 | 45 52 20 66 61 69 6c 20 |If we EV|ER fail |
|00000580| 74 6f 20 61 63 6b 6e 6f | 77 6c 65 64 67 65 20 61 |to ackno|wledge a|
|00000590| 0d 01 ae 45 f4 20 4d 65 | 73 73 61 67 65 5f 53 65 |...E. Me|ssage_Se|
|000005a0| 74 53 6c 6f 74 2c 20 74 | 68 65 20 53 77 69 74 63 |tSlot, t|he Switc|
|000005b0| 68 65 72 20 77 69 6c 6c | 20 67 69 76 65 20 75 73 |her will| give us|
|000005c0| 20 61 20 67 72 65 65 6e | 2c 20 75 6e 64 72 61 67 | a green|, undrag|
|000005d0| 67 61 62 6c 65 0d 01 b8 | 49 f4 20 73 6c 6f 74 2e |gable...|I. slot.|
|000005e0| 20 41 73 20 6c 6f 6e 67 | 20 61 73 20 77 65 20 61 | As long| as we a|
|000005f0| 6c 77 61 79 73 20 61 63 | 6b 6e 6f 77 6c 65 64 67 |lways ac|knowledg|
|00000600| 65 20 74 68 65 20 6d 65 | 73 73 61 67 65 2c 20 65 |e the me|ssage, e|
|00000610| 76 65 6e 20 69 66 20 77 | 65 20 68 61 76 65 0d 01 |ven if w|e have..|
|00000620| c2 46 f4 20 69 67 6e 6f | 72 65 64 20 74 68 65 20 |.F. igno|red the |
|00000630| 6e 65 77 20 73 75 67 67 | 65 73 74 65 64 20 73 6c |new sugg|ested sl|
|00000640| 6f 74 20 73 69 7a 65 20 | 62 65 63 61 75 73 65 20 |ot size |because |
|00000650| 69 74 20 69 73 20 74 6f | 6f 20 73 6d 61 6c 6c 2c |it is to|o small,|
|00000660| 20 74 68 65 0d 01 cc 32 | f4 20 53 77 69 74 63 68 | the...2|. Switch|
|00000670| 65 72 20 77 69 6c 6c 20 | 67 69 76 65 20 75 73 20 |er will |give us |
|00000680| 61 20 72 65 64 2c 20 64 | 72 61 67 67 61 62 6c 65 |a red, d|raggable|
|00000690| 20 73 6c 6f 74 2e 0d 01 | d6 04 0d 01 e0 77 21 71 | slot...|.....w!q|
|000006a0| 25 3d 32 38 3a 71 25 21 | 34 3d 30 3a 71 25 21 38 |%=28:q%!|4=0:q%!8|
|000006b0| 3d 30 3a 71 25 21 31 32 | 3d 6d 65 73 73 5f 69 64 |=0:q%!12|=mess_id|
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|000006d0| 25 21 32 30 3d 63 75 72 | 5f 73 6c 6f 74 25 3a 71 |%!20=cur|_slot%:q|
|000006e0| 25 21 32 38 3d 6f 75 72 | 74 61 73 6b 25 3a c8 99 |%!28=our|task%:..|
|000006f0| 22 57 69 6d 70 5f 53 65 | 6e 64 4d 65 73 73 61 67 |"Wimp_Se|ndMessag|
|00000700| 65 22 2c 31 39 2c 71 25 | 2c 74 61 73 6b 6d 61 6e |e",19,q%|,taskman|
|00000710| 25 0d 01 ea 05 cd 0d 01 | f4 05 e1 0d ff 1a 1a 1a |%.......|........|
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+--------+-------------------------+-------------------------+--------+--------+