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EnumDeviceDrivers function

Retrieves the load address for each device driver in the system.

Syntax


BOOL WINAPI EnumDeviceDrivers(
  _Out_  LPVOID *lpImageBase,
  _In_   DWORD cb,
  _Out_  LPDWORD lpcbNeeded
);

Parameters

lpImageBase [out]

An array that receives the list of load addresses for the device drivers.

cb [in]

The size of the lpImageBase array, in bytes. If the array is not large enough to store the load addresses, the lpcbNeeded parameter receives the required size of the array.

lpcbNeeded [out]

The number of bytes returned in the lpImageBase array.

Return value

If the function succeeds, the return value is nonzero.

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

Remarks

To determine how many device drivers were enumerated by the call to EnumDeviceDrivers, divide the resulting value in the lpcbNeeded parameter by sizeof(LPVOID).

Starting with Windows 7 and Windows Server 2008 R2, Psapi.h establishes version numbers for the PSAPI functions. The PSAPI version number affects the name used to call the function and the library that a program must load.

If PSAPI_VERSION is 2 or greater, this function is defined as K32EnumDeviceDrivers in Psapi.h and exported in Kernel32.lib and Kernel32.dll. If PSAPI_VERSION is 1, this function is defined as EnumDeviceDrivers in Psapi.h and exported in Psapi.lib and Psapi.dll as a wrapper that calls K32EnumDeviceDrivers.

Programs that must run on earlier versions of Windows as well as Windows 7 and later versions should always call this function as EnumDeviceDrivers. To ensure correct resolution of symbols, add Psapi.lib to the TARGETLIBS macro and compile the program with –DPSAPI_VERSION=1. To use run-time dynamic linking, load Psapi.dll.

Examples

For an example, see Enumerating all Device Drivers in the System.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

Psapi.h

Library

Kernel32.lib on Windows 7 and Windows Server 2008 R2;
Psapi.lib (if PSAPI_VERSION=1) on Windows 7 and Windows Server 2008 R2;
Psapi.lib on Windows Server 2008, Windows Vista, Windows Server 2003, and Windows XP

DLL

Kernel32.dll on Windows 7 and Windows Server 2008 R2;
Psapi.dll (if PSAPI_VERSION=1) on Windows 7 and Windows Server 2008 R2;
Psapi.dll on Windows Server 2008, Windows Vista, Windows Server 2003, and Windows XP

See also

Device Driver Information
GetDeviceDriverBaseName
GetDeviceDriverFileName
PSAPI Functions

 

 

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