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OpenDriver function

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Opens an instance of an installable driver and initializes the instance using either the driver's default settings or a driver-specific value.

Syntax

HDRVR WINAPI OpenDriver(
  _In_ LPCWSTR lpDriverName,
  _In_ LPCWSTR lpSectionName,
  _In_ LPARAM  lParam
);

Parameters

  • lpDriverName [in]
    Address of a null-terminated, wide-character string that specifies the filename of an installable driver or the name of a registry value associated with the installable driver. (This value must have been previously set when the driver was installed.)

  • lpSectionName [in]
    Address of a null-terminated, wide-character string that specifies the name of the registry key containing the registry value given by the lpDriverName parameter. If lpSectionName is NULL, the registry key is assumed to be Drivers32.

  • lParam [in]
    32-bit driver-specific value. This value is passed as the lParam2 parameter to the DriverProc function of the installable driver.

Return value

Returns the handle of the installable driver instance if successful or NULL otherwise.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Version

Installable Drivers, Installable Driver Functions

Header

 Mmsystem.h (include Windows.h)

Library

 Winmm.lib

DLL

 Winmm.dll

See also

Installable Drivers

Installable Driver Functions