The following link explains the Touch Screen Driver functions. Since we cannot directly call these function using Windows Mobile SDK, we have to load the CoreDll.dll file and call these function dynamically. The following code snippet start the Touch Screen calibration programmatically.

typedef BOOL (WINAPI* pfnTouchCalibrate)(void)
int _tmain(int argc, _TCHAR* argv[])
{
	HMODULE hCoreDLL = LoadLibrary(_T("coredll.dll"));
	pfnTouchCalibrate pTouchCalibrate = (pfnTouchCalibrate)GetProcAddress(hCoreDLL, _T("TouchCalibrate"));
	if (pTouchCalibrate)
		pTouchCalibrate();
	FreeLibrary(hCoreDLL);
}