IMFPMPCallback_QueryInterfaceProc

QueryInterface method of IMFPMPCallback - a IMFPMediaPlayerCallback object.

IMFPMPCallback_QueryInterfaceProc PROTO pThis:DWORD, riid:DWORD, ppvObject:DWORD

Parameters

pThis - pointer to this IMFPMediaPlayerCallback object.
riid - A reference to the interface identifier (IID) of the interface being queried for.
ppvObject - The address of a pointer to an interface with the IID specified in the riid parameter. Because you pass the address of an interface pointer the method can overwrite that address with the pointer to the interface being queried for. Upon successful return, ppvObject (the dereferenced address) contains a pointer to the requested interface. If the object doesn’t support the interface, the method sets ppvObject (the dereferenced address) to nullptr.

Returns

E_NOINTERFACE

Notes

Used in MFPMediaPlayer_Init for the callback function address.