Listed below are the keycodes returned by the function GetKey:

Miscellaneous Keys
     BackSp  = #8        PgUp  = #201       CtrlPgUp = #138
     Tab     = #9        PgDn  = #209       CtrlPgDn = #246
     Enter   = #13       End   = #207       CtrlEnd  = #245
     Esc     = #27       Home  = #199       CtrlHome = #247
     STab    = #143      Ins   = #210       Del      = #211

     LArr    = #203      CtrlLArr  = #243
     RArr    = #205      CtrlRArr  = #244
     UArr    = #200      CtrlPrtsc = #242
     DArr    = #208

Numbers                 Mouse keys
   Alt1 = #248           MUp     = #128
   Alt2 = #249           MDown   = #129
   Alt3 = #250           MLeft   = #130
   Alt4 = #251           MRight  = #131
   Alt5 = #252           MLeftB  = #133
   Alt6 = #253           MEnter  = #133
   Alt7 = #254           MEsc    = #132
   Alt8 = #255           MRightB = #132
   Alt9 = #134
   Alt0 = #135
   Altminus = #136
   Altequals = #137

Function keys
  F1  = #187   sF1  = #212   CtrlF1  = #222  AltF1  = #232
  F2  = #188   sF2  = #213   CtrlF2  = #223  AltF2  = #233
  F3  = #189   sF3  = #214   CtrlF3  = #224  AltF3  = #234
  F4  = #190   sF4  = #215   CtrlF4  = #225  AltF4  = #235
  F5  = #191   sF5  = #216   CtrlF5  = #226  AltF5  = #236
  F6  = #192   sF6  = #217   CtrlF6  = #227  AltF6  = #237
  F7  = #193   sF7  = #218   CtrlF7  = #228  AltF7  = #238
  F8  = #194   sF8  = #219   CtrlF8  = #229  AltF8  = #239
  F9  = #195   sF9  = #220   CtrlF9  = #230  AltF9  = #240
  F10 = #196   sF10 = #221   CtrlF10 = #231  AltF10 = #241
  F11 = #139   sF11 = #141   CtrlF11 = #154  AltF11 = #156
  F12 = #140   sF12 = #142   CtrlF12 = #155  AltF12 = #157

Alphabet
  CtrlA  = #1     CtrlN  = #14    AltA  = #158   AltN  = #177
  CtrlB  = #2     CtrlO  = #15    AltB  = #176   AltO  = #152
  CtrlC  = #3     CtrlP  = #16    AltC  = #174   AltP  = #153
  CtrlD  = #4     CtrlQ  = #17    AltD  = #160   AltQ  = #144
  CtrlE  = #5     CtrlR  = #18    AltE  = #146   AltR  = #147
  CtrlF  = #6     CtrlS  = #19    AltF  = #161   AltS  = #159
  CtrlG  = #7     CtrlT  = #20    AltG  = #162   AltT  = #148
  CtrlH  = #8     CtrlU  = #21    AltH  = #163   AltU  = #150
  CtrlI  = #9     CtrlV  = #22    AltI  = #151   AltV  = #175
  CtrlJ  = #10    CtrlW  = #23    AltJ  = #164   AltW  = #145
  CtrlK  = #11    CtrlX  = #24    AltK  = #165   AltX  = #173
  CtrlL  = #12    CtrlY  = #25    AltL  = #166   AltY  = #149
  CtrlM  = #13    CtrlZ  = #26    AltM  = #178   AltZ  = #172