这是一个用Delphi编译的软件程序，已脱壳，软件安装后自动生成机器码，用户输入注册码与机器码比较后，相等则注册成功。
以下是用DEDE反汇编得出的代码，代码中地址005703C0－005703FB这一段是点击“注册”鍵的事件响应代码。小弟不懂算法，
求各位大师及行家帮助进行算法分析，敬请注释详细一点，以便学习理解，因本人实在太菜，多多包涵。附件中复制了部分CALL的代码，供参考。
点击“注册”鍵后跳到以下代码：
005703C0 53 push ebx
005703C1 8BD8 mov ebx, eax
005703C3 A1340A5800 mov eax, dword ptr [$00580A34]
005703C8 83B80801000000 cmp dword ptr [eax+$0108], +$00
005703CF 7E12 jle 005703E3
005703D1 BA04045700 mov edx, $00570404
005703D6 8B8310030000 mov eax, [ebx+$0310]
* Reference to: Controls.TControl.SetText(TControl;TCaption);
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005703DC E863DBEDFF
call 0044DF44
005703E1 EB10 jmp 005703F3
005703E3 BA14045700 mov edx, $00570414
005703E8 8B8310030000 mov eax, [ebx+$0310]
* Reference to: Controls.TControl.SetText(TControl;TCaption);
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005703EE E851DBEDFF
call 0044DF44
005703F3 8BC3 mov eax, ebx
* Reference to: Forms.TCustomForm.Close(TCustomForm);
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005703F5 E8A6A6EFFF call 0046AAA0
005703FA 5B pop ebx
005703FB C3 ret
--------------------------------------------------------------------
call 0044DF44 （以下代码）
0044DF44 55 push ebp
0044DF45 8BEC mov ebp, esp
0044DF47 6A00 push $00
0044DF49 53 push ebx
0044DF4A 56 push esi
0044DF4B 8BF2 mov esi, edx
0044DF4D 8BD8 mov ebx, eax
0044DF4F 33C0 xor eax, eax
0044DF51 55 push ebp
0044DF52 6899DF4400 push $0044DF99
***** TRY
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0044DF57 64FF30 push dword ptr fs:[eax]
0044DF5A 648920 mov fs:[eax], esp
0044DF5D 8D55FC lea edx, [ebp-$04]
0044DF60 8BC3 mov eax, ebx
* Reference to: Controls.TControl.GetText(TControl):TCaption;
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0044DF62 E8ADFFFFFF
call 0044DF14
0044DF67 8B45FC mov eax, [ebp-$04]
0044DF6A 8BD6 mov edx, esi
* Reference to: System.@LStrCmp;
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0044DF6C E80B71FBFF
call 0040507C
0044DF71 7410 jz 0044DF83
0044DF73 8BC6 mov eax, esi
* Reference to: System.@LStrToPChar(String):PAnsiChar;
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0044DF75 E8B671FBFF
call 00405130
0044DF7A 8BD0 mov edx, eax
0044DF7C 8BC3 mov eax, ebx
* Reference to: Controls.TControl.SetTextBuf(TControl;PChar);
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0044DF7E E86DFFFFFF
call 0044DEF0
0044DF83 33C0 xor eax, eax
0044DF85 5A pop edx
0044DF86 59 pop ecx
0044DF87 59 pop ecx
0044DF88 648910 mov fs:[eax], edx
****** FINALLY
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0044DF8B 68A0DF4400 push $0044DFA0
0044DF90 8D45FC lea eax, [ebp-$04]
* Reference to: System.@LStrClr(void;void);
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0044DF93 E8E86CFBFF
call 00404C80
0044DF98 C3 ret
* Reference to: System.@HandleFinally;
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0044DF99 E96A66FBFF jmp 00404608
0044DF9E EBF0 jmp 0044DF90
****** END
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0044DFA0 5E pop esi
0044DFA1 5B pop ebx
0044DFA2 59 pop ecx
0044DFA3 5D pop ebp
0044DFA4 C3 ret
附上部分CALL段代码。
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