when I compile the  ptlib-v2_0_1,I find the config in ptbuildopts.h show below:

 

/////////////////////////////////////////////////
//
// DirectX Support (Windows only)
//

 

#ifndef _WIN32_WCE
#define P_DIRECTSOUND 1
#undef P_DIRECTSHOW
#undef P_VFW_CAPTURE
#endif

 

  So I can not get the directshow support.but I can get the directsound support.I indeed install directx 9.0c.so it can find the directx file.

but why it can not find the directshow? Besides,I also can not find the dshow.h.

Who can help me ?thanks!