DirectDrawEnumerateEx

This function enumerates all DirectDraw devices installed on the system. The NULL entry always identifies the primary display device shared with GDI.

HRESULT WINAPI DirectDrawEnumerateEx(
  LPDDENUMCALLBACKEX lpCallback, 
  LPVOID lpContext, 
  DWORD dwFlags
); 

Parameters

• lpCallback
  [in] Address of a DDEnumCallbackEx function that will be called with a description of each enumerated DirectDraw-enabled HAL.
• lpContext
  [in] Address of an application-defined value that will be passed to the enumeration callback function each time it is called.
• dwFlags
  [in] Flags specifying the enumeration scope. This parameter can be zero or a combination of the following flags. If the value is zero, the function will enumerate only the primary display device.

  Flag	Description
  DDENUM_ATTACHEDSECONDARYDEVICES	The function will enumerate the primary device, and any display devices that are attached to the desktop.
  DDENUM_DETACHEDSECONDARYDEVICES	The function will enumerate the primary device, and any display devices that are not attached to the desktop.
  DDENUM_NONDISPLAYDEVICES	The function will enumerate the primary device, and any non-display devices, such as 3-D accelerators that have no 2-D capabilities.

Return Values

If the function succeeds, the return value is DD_OK.

If the function fails, the return value is DDERR_INVALIDPARAMS.

Remarks

Retrieve the DirectDrawEnumerateEx function's address from the Ddraw.dll dynamic-link library by calling the GetProcAddress Win32® function with the DirectDrawEnumerateExA (ANSI) or DirectDrawEnumerateExW (Unicode) process name strings. If GetProcAddress fails, then the installed version of the operating system does not support multiple monitors.

The W version of this function in Windows CE provides Unicode support.

Requirements

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header: Ddraw.h.
Link Library: Ddraw.lib.

 Last updated on Thursday, April 08, 2004

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