Advantech PCI-1682U Manual do Utilizador descarregar pdf (Página 35)

29 PCI-1680U/1682U User Manual

Chapter 4 Software Requirements

4.3.2 CloseHandle

Close the port by calling this function when operation is completed.

Syntax

BOOL CloseHandle(

HANDLE hDevice

);

Parameters

Return Value

Successful: return non-zero values. Unsuccessful: return zero value. Please call Get-

LastError function.

Example

//close

BOOL bRet = CloseHandle(hDevice);

See Also

CreateFile

4.3.3 DeviceIoControl

Users can use this interface to send commands, configure ports, like stop device,

start device, configure Baud Rate, etc.

See Command_par, CanStatusPar_t for detailed configuration.

Syntax

BOOL DeviceIoControl(

HANDLE hDevice,

DWORD dwIoControlCode,

LPVOID lpInBuffer,

DWORD nInBufferSize,

LPVOID lpOutBuffer,

DWORD nOutBufferSize,

LPDWORD lpBytesReturned,

LPOVERLAPPED lpOverlapped

);

Name Direction Description

hDevice Input Handle of the device which was opened.

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