EnumVideoCallback

The EnumVideoCallback function is an application-defined callback function for the IDDVideoPortContainer::EnumVideoPorts method.

HRESULT WINAPI EnumVideoCallback(
  LPDDVIDEOPORTCAPS lpDDVideoPortCaps,  
  LPVOID lpContext                      
);

Parameters

lpDDVideoPortCaps

Address of the DDVIDEOPORTCAPS structure that contains the video port information, including the ID and capabilities. This data is read-only.

lpContext

Address of a caller-defined structure that is passed to the member every time that it is called.

Return Values

The callback function returns DDENUMRET_OK to continue the enumeration.

It returns DDENUMRET_CANCEL to stop the enumeration.

Remarks

Video-port-related functions cannot be called from inside the EnumVideoCallback function. Attempts to do so fail, returning DDERR_CURRENTLYNOTAVAIL.

You can use the LPDDENUMVIDEOCALLBACK data type to declare a variable that can contain a pointer to this callback function.

Requirements

  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in ddraw.h.
  Import Library: User-defined.