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1 { |
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2 NSIS ExDLL example |
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3 (C) 2001 - Peter Windridge |
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4 |
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5 Fixed and formatted by Brett Dever |
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6 http://editor.nfscheats.com/ |
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7 |
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8 Tested in Delphi 7.0 |
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9 } |
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10 |
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11 library exdll; |
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12 |
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13 uses Windows; |
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14 |
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15 type |
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16 VarConstants = ( |
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17 INST_0, |
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18 INST_1, // $1 |
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19 INST_2, // $2 |
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20 INST_3, // $3 |
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21 INST_4, // $4 |
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22 INST_5, // $5 |
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23 INST_6, // $6 |
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24 INST_7, // $7 |
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25 INST_8, // $8 |
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26 INST_9, // $9 |
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27 INST_R0, // $R0 |
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28 INST_R1, // $R1 |
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29 INST_R2, // $R2 |
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30 INST_R3, // $R3 |
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31 INST_R4, // $R4 |
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32 INST_R5, // $R5 |
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33 INST_R6, // $R6 |
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34 INST_R7, // $R7 |
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35 INST_R8, // $R8 |
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36 INST_R9, // $R9 |
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37 INST_CMDLINE, // $CMDLINE |
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38 INST_INSTDIR, // $INSTDIR |
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39 INST_OUTDIR, // $OUTDIR |
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40 INST_EXEDIR, // $EXEDIR |
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41 INST_LANG, // $LANGUAGE |
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42 __INST_LAST |
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43 ); |
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44 TVariableList = INST_0..__INST_LAST; |
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45 pstack_t = ^stack_t; |
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46 stack_t = record |
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47 next: pstack_t; |
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48 text: PChar; |
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49 end; |
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50 |
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51 var |
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52 g_stringsize: integer; |
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53 g_stacktop: ^pstack_t; |
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54 g_variables: PChar; |
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55 g_hwndParent: HWND; |
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56 |
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57 function PopString(): string; |
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58 var |
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59 th: pstack_t; |
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60 begin |
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61 if integer(g_stacktop^) <> 0 then begin |
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62 th := g_stacktop^; |
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63 Result := PChar(@th.text); |
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64 g_stacktop^ := th.next; |
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65 GlobalFree(HGLOBAL(th)); |
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66 end; |
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67 end; |
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68 |
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69 procedure PushString(const str: string=''); |
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70 var |
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71 th: pstack_t; |
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72 begin |
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73 if integer(g_stacktop) <> 0 then begin |
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74 th := pstack_t(GlobalAlloc(GPTR, SizeOf(stack_t) + g_stringsize)); |
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75 lstrcpyn(@th.text, PChar(str), g_stringsize); |
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76 th.next := g_stacktop^; |
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77 g_stacktop^ := th; |
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78 end; |
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79 end; |
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80 |
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81 function GetUserVariable(const varnum: TVariableList): string; |
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82 begin |
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83 if (integer(varnum) >= 0) and (integer(varnum) < integer(__INST_LAST)) then |
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84 Result := g_variables + integer(varnum) * g_stringsize |
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85 else |
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86 Result := ''; |
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87 end; |
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88 |
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89 procedure SetUserVariable(const varnum: TVariableList; const value: string); |
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90 begin |
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91 if (value <> '') and (integer(varnum) >= 0) and (integer(varnum) < integer(__INST_LAST)) then |
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92 lstrcpy(g_variables + integer(varnum) * g_stringsize, PChar(value)) |
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93 end; |
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94 |
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95 procedure NSISDialog(const text, caption: string; const buttons: integer); |
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96 begin |
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97 MessageBox(g_hwndParent, PChar(text), PChar(caption), buttons); |
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98 end; |
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99 |
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100 procedure ex_dll(const hwndParent: HWND; const string_size: integer; const variables: PChar; const stacktop: pointer); cdecl; |
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101 begin |
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102 // setup global variables |
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103 g_stringsize := string_size; |
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104 g_hwndParent := hwndParent; |
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105 g_stacktop := stacktop; |
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106 g_variables := variables; |
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107 // end global variable setup |
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108 |
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109 NSISDialog(GetUserVariable(INST_0), 'The value of $0', MB_OK); |
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110 NSISDialog(PopString, 'pop', MB_OK); |
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111 PushString('Hello, this is a push'); |
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112 SetUserVariable(INST_0, 'This is user var $0'); |
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113 end; |
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114 |
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115 exports ex_dll; |
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116 |
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117 begin |
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118 end. |