Hi, this is somekind of a dump question: I tried to derive a MIDI driver from the samples in the ddk. Now when I try to build it I get errors like that attached below this text. Does anyone has an idea which library I have to include? I included (of course) portcls.h which should declare all stuff from portcls.lib / sys, but this seems not to be the answer. a grep for the symbol didn't showed up any library. best regards doc schnipp _________//______________________________ (sorry for the german error messages, it's all unresolved external symbol): midi03 error LNK2001: Nichtaufgeloestes externes Symbol _IID_IMiniport midi03 error LNK2001: Nichtaufgeloestes externes Symbol _IID_IMiniport midi03 error LNK2019: Nicht aufgeloestes externes Symbol "long __stdcall CreateMiniportMidi(struct IUnknown * *,struct _GUID const &,struct IUnknown *,enum _POOL_TYPE)" (?CreateMiniportMidi@@YGJPAPAUIUnknown@@ABU_GUID@@PAU1@W4_POOL_TYPE@@@Z), verwiesen in Funktion "long __stdcall StartDevice(struct _DEVICE_OBJECT *,struct _IRP *,struct IResourceList *)" (?StartDevice@@YGJPAU_DEVICE_OBJECT@@PAU_IRP@@PAUIResourceList@@@Z) midi03 error LNK2001: Nichtaufgeloestes externes Symbol _CLSID_MiniportDriverUart midi03 error LNK2001: Nichtaufgeloestes externes Symbol _IID_IPortEvents midi03 error LNK2001: Nichtaufgeloestes externes Symbol _CLSID_PortMidi midi03 error LNK2001: Nichtaufgeloestes externes Symbol _IID_IServiceSink midi03 error LNK2001: Nichtaufgeloestes externes Symbol _IID_IMiniportMidiStream midi03 error LNK2019: Nicht aufgeloestes externes Symbol "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z), verwiesen in Funktion "public: long __thiscall CMiniportMidi::CreateMiniportMidi(struct IUnknown * *,struct _GUID const &,struct IUnknown *,enum _POOL_TYPE)" (?CreateMiniportMidi@CMiniportMidi@@QAEJPAPAUIUnknown@@ABU_GUID@@PAU2@W4_POOL_TYPE@@@Z) __________________________________________________________________ Gesendet von Yahoo! Mail - http://mail.yahoo.de Möchten Sie mit einem Gruß antworten? http://grusskarten.yahoo.de ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/