Intermec 751G user manual Kernel I/O Controls, Syntax, Parameters, Return Values

Chapter 3 — Configuring the Computer

Should you want your 751G to display a full screen, use the following links.

These give full instructions on how to display full screen.

•Instructions on how to create a full screen application for eVC++ applications using an SHFullScreen() API: support.microsoft.com/support/kb/articles/Q266/2/44.ASP

•Instructions on how to create a full screen application for eVB applications also using the SHFullScreen() API: support.microsoft.com/support/kb/articles/Q265/4/51.ASP

Kernel I/O Controls

This describes the KernelIoControl() 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);

You can also see the Device Resource Kit in the Intermec Developer Library (IDL) for information about these functions. The IDL is available as a download from the Intermec web site at www.intermec.com/idl. Contact your Intermec representative for more information.

IOCTL_HAL_GET_DEVICE_INFO

This IOCTL returns either the platform type or the OEMPLATFORM name based on an input value.

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_GETPLATFORMTYPE 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_GETOEMINFO is specified in lpInBuf, then the “Intermec
	700\0” Unicode string is returned.
nOutBufSize	The size of lpOutBuf 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.

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