Resolving unresolved external symbol CSourceSeeking::CSourceSeeking(…) despite linking with the right library

Question

Here is the error:

Error 2 error LNK2019: unresolved external symbol "protected: __thiscall CSourceSeeking::CSourceSeeking(char const *,struct IUnknown *,long *,class CCritSec *)" (??
0CSourceSeeking@@IAE@PBDPAUIUnknown@@PAJPAVCCritSec@@@Z) referenced in function "public: __thiscall CPushPin::CPushPin(long *,class CSource *)" (??0CPushPin@@QAE@PAJPAVCSource@@@Z) C:\\Users\\x\\Desktop\\PushSource\\PushFilter.obj > PushSource

Here are my libs:

gdiplus.lib strmbasd.lib msvcrtd.lib winmm.lib odbc32.lib odbccp32.lib

What lib is CSourceSeeking in?

Answer 1

You have to create Strmbase.lib / Strmbased.lib yourself, apparently. Make sure it's built for your target (ie if your program is 32-bit, make sure it's built as a 32-bit library; same for 64-bit).

Answer 2

At the bottom of most C/C++ API Reference pages on MSDN you will find a References section telling you what headers to include and what libraries to link with.

Correspondingly, in the References section of the CSourceSeeking reference page you shall find your answer:

Strmbase.lib (retail builds)
Strmbasd.lib (debug builds)

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EDIT

See @Cornstalk's answer for instructions on how to build Strmbase.lib / Strmbased.lib yourself. When you build Strmbase.lib / Strmbased.lib , make sure the library build settings match your program's build settings: 32/64 bit, UNICODE / ANSI , etc. Using different settings for one or the other will cause errors.

Answer 3

CSourceSeeking class is part of the Strmbase.lib library (or Strmbasd.lib for debug builds). Generally, MSDN states header file(s) and library(ies) requirements under "Requirements" section of a corresponding documentation page.