[NumLock]

вот что нашел в MSDN:

EjectDiskFromSADrive Function

[Removable Storage Manager is no longer available as of Windows 7 and Windows Server 2008 R2.]

The EjectDiskFromSADrive function ejects the media that is in a standalone removable drive.

Syntax

DWORD EjectDiskFromSADrive(
__in LPCWSTR lpComputerName,
__in LPCWSTR lpAppName,
__in LPCWSTR lpDeviceName,
__in HWND hWnd,
__in LPCWSTR lpTitle,
__in LPCWSTR lpMessage,
__in DWORD dwOptions
);

http://msdn.microsoft.com/en-us/libr...02(VS.85).aspx