Hi,
Those are C++ decorated names, containing information about the function.
Fortunately, that also includes the parameters and their types.
To find out what the parameters are, you can use "undname.exe" included with Visual Studio.
There also seem to be some open source alternatives like
demumble or
msvcfilt.
For example using undname with the first export from your DLL results in the following output:
> undname.exe ?IPSTB_GetvideoInterfaceSCARTTVCRAspectFunction@@YAIPAI@Z
Microsoft (R) C++ Name Undecorator
Copyright (C) Microsoft Corporation. All rights reserved.
Undecoration of :- "?IPSTB_GetvideoInterfaceSCARTTVCRAspectFunction@@YAIPAI@Z"
is :- "unsigned int __cdecl IPSTB_GetvideoInterfaceSCARTTVCRAspectFunction(unsigned int *)"
The following Microsoft article describes how decorated names work in more detail:
Decorated names.