Measurement-computing ADLIB WIN Manual do Utilizador descarregar pdf (Página 49)

Chapter 12 Logical Device String Names

11-3

11.2 AL_ReleaseDevice

Prototype C\C++

ERRNUM AL_ReleaseDevice(LHLD lhld);

Visual Basic for Windows

Function AL_ReleaseDevice(ByVal lhld As Long) As Long

LHLD lhld handle of the LDSD to be released

The AL_ReleaseDevice function releases a logical device subsystem database (LDSD) and all associated

memory previously allocated to the device. Further calls to the LDSD will return an invalid LHLD error

code, all previously returned pointers from the LDSD to the user application that provide access to the

device or its data buffers are considered invalid (NULL) and must not be used by the application program.

Parameter Description

lhld Identifies the instance of the logical device subsystem to be released.

Returns:

On success ERRNUM is set to 1, otherwise ERRNUM contains the last error code that occurred during the

call.

Notes

If the device is currently running, an error flag setting determines whether to stop and then release, or to

return a non-critical error and keep the device running. See the function AL_SetErrorOnReleaseRunning

for more information.

Related Functions:

AL_AllocateDevice

Program References:

ALL

Supported Logical Device Subsystems:

All

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 190 191

Sem comentários

Measurement-computing ADLIB WIN Manual do Utilizador Página 49