Filter
Top Products
ProgrammingChapter —7
250 700 Series Color Mobile Computer User’sManual
Kernel I/O C ontrols
This describes the Ker nelIoControl() functions available to application
programmers. Most C++ applications will need to prototype the function
as the following to avoid link and compile errors.
extern “C” BOOL KernelIoControl(DWORD dwIoControlCode, LPVOID lpInBuf, DWORD
nInBufSize, LPVOID lpOutBuf, DWORD nOutBufSize, LPDWORD lpBytesReturned);
IOCTL_HAL_GET_DEVICE_INFO
This IOCTL returns either the platform type or the OEMPLATFORM
namebasedonaninputvalue.
Syntax
BOOL KernelIoControl( IOCTL_HAL_GET_DEVICE_INFO, LPVOID
lpInBuf, DWORD nInBufSize, LPVOID lpOutBuf, DWORD
nOutBufSize, LPDWORD lpBytesReturned );
Parameters
lpInBuf Points to a DWORD containing either the SPI_GET PLAT-
FORMTYPE or SPI_GETOEMINFO value.
lpInBufSize Must be set to sizeof(DWORD).
lpOutBuf Must point to a buffer large enough to hold the return data of the
function. If SPI_GETPLATFORMTYPE is specified in lpInBuf,
then the “PocketPC\0” Unicode string is returned. If SPI_GE-
TOEMINFO is s pecified in lpInBuf, then the “Intermec 700\0”
Unicode string is returned.
nOutBufSize ThesizeoflpOutBuf in bytes. Must be large enough to hold the
string returned.
lpBytesReturned The actual number of bytes returned by the function for the data
requested.
Return Values
Returns TRUE if function succeeds. Returns FALSE if the function fails.
GetLastError() may be used to get the extended error value.