[Bug 23866] Microsoft Wine Guide crashes, unimplemented function msvideo.dll16._MCIWNDCREATE

http://bugs.winehq.org/show_bug.cgi?id=23866

--- Comment #5 from Dmitry Timoshkov   2010-08-13 22:54:08 ---
(In reply to comment #2)
> Created an attachment (id=30117)

--> (http://bugs.winehq.org/attachment.cgi?id=30117) [details]
> forward MCIWndCreate to MCIWndCreateA
>
> i'm not sure if the attached patch is correct.  Please give it a try

+HWND16 MCIWndCreate16(HWND16 hwnd, HINSTANCE16 hinst16, DWORD style, LPSTR
file)
+{
+    HINSTANCE hinst32;
+    if (hinst16 == GetModuleHandle16("msvideo.dll"))
+        hinst32 = GetModuleHandleA("msvfw32.dll");
+    else
+        hinst32 = HINSTANCE_32(GetExePtr( hinst16 ));
+    return HWND_16(MCIWndCreateA(HWND_32(hwnd), hinst32, style, file));
+}
...
+250 cdecl _MCIWndCreate(word word long str) MCIWndCreate16

Why do you think that 16-bit MCIWndCreate is supposed to be cdecl?
If that's really the case you need to add CDECL to the API implementation.