[Bug 53037] ChemDraw 21 installer doesn't allow accepting the license

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53037

--- Comment #7 from Fabian Maurer <dark.shadow4 at web.de> ---
I suspected the program just hardcodes the amount of lines, here is the proof.
Since the program is VB, we can pretty easily take a peek with a disassembler.
Here a trimmed snipped:

>   push 00000001h
>   mov eax, var_B0
>   push eax
>   call GetScrollPos
>   mov var_B4, eax
> ...
>   lea edx, var_24
>   push edx
>   lea eax, var_20
>   push eax
>   push 00000001h
>   mov ecx, var_B0
>   push ecx
>   call GetScrollRange
>   mov edx, var_24
>   sub edx, 0000000Ch
>   jo 007493D8h
>   cmp var_B4, edx
>   jnz 0074928Ah
> ...
> 0074928A:
> ...
> 007493D8h:

High level code translation (Might be not 100% accurate):

> pos = GetScrollPos(<hwnd>, 1)
> GetScrollRange(<hwnd>, 1, &dummy, &max)
> if (pos == max - 12) {
>     //Disable timer, enable radio buttons
> }

Seems like a badly designed program TBH, but it's what we have to deal with.

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