DeleteUmsCompletionList function (winbase.h)

Deletes the specified user-mode scheduling (UMS) completion list. The list must be empty.


As of Windows 11, user-mode scheduling is not supported. All calls fail with the error ERROR_NOT_SUPPORTED.


BOOL DeleteUmsCompletionList(
  [in] PUMS_COMPLETION_LIST UmsCompletionList


[in] UmsCompletionList

A pointer to the UMS completion list to be deleted. The CreateUmsCompletionList function provides this pointer.

Return value

If the function succeeds, it returns a nonzero value.

If the function fails, the return value is zero. To get extended error information, call GetLastError.


If the completion list is shared, the caller is responsible for ensuring that no active UMS thread holds a reference to the list before deleting it.


Minimum supported client Windows 7 (64-bit only) [desktop apps only]
Minimum supported server Windows Server 2008 R2 [desktop apps only]
Target Platform Windows
Header winbase.h (include Windows.h)
Library Kernel32.lib
DLL Kernel32.dll
API set api-ms-win-core-ums-l1-1-0 (introduced in Windows 7)