Elo TouchSystems MonitorMouse FOR WINDOWS NT Version 2.0 Launching the Touchscreen Control Panel

Launching the Touchscreen Control Panel 29

IoctlResult = DeviceIoControl(

hndFile,	// Handle to device
IoctlCode,	// IO Control code
NULL,	// We don't need input	data
0,	// No input buffer required, 0 bytes
&IOBuffer,	// Buffer from driver.
	// This buffer will contain Z data
DataLength,	// Length of buffer in	bytes.
&ReturnedLength,	// Bytes placed in DataBuffer.
NULL	// NULL means wait I/O	completes.

);

if (!IoctlResult)	// We had a real mouse event.
;	//	The DeviceIoControl call will
	//	return 0 if a mouse(not touch)
	// event occurred.

LAUNCHING THE TOUCHSCREEN CONTROL PANEL

It is possible to launch the Touchscreen Control Panel directly from a Windows NT application using the following code:

handle = WinExec("control monmouse.cpl", SW_SHOWNORMAL);

CALIBRATING FROM WITHIN YOUR PROGRAM

You may also call the calibration procedure of the Touchscreen Control Panel directly from your program with the exported function Calibrate-Screen(). It takes two arguments-your window handle and a timeout value in seconds (0 = no timeout).

The following code fragment demonstrates how to call this function. For a complete example, see the included source code, CALIB.C.

WORD	Timeout;
HWND	hWnd;	//	window handle
FARPROC lpfnCalibrateScreen;		//	pointer to Calibrate function
HANDLE hLibrary;			// MONMOUSE.CPL library handle

//Load the Control Panel applet hLibrary = LoadLibrary("MONMOUSE.CPL"); if (hLibrary < (HANDLE)32) {

MessageBox(NULL, "Could not load Calibration Library.",

"NoLoad", MB_OK);

break;

}

// Get address of CalibrateScreen function

lpfnCalibrateScreen = GetProcAddress(hLibrary, MAKEINTRESOURCE(4));

//timeout in 5 minutes

Timeout = 300;

//Call CalibrateScreen function

(*lpfnCalibrateScreen)(hWnd, Timeout); FreeLibrary(hLibrary);