//===========================================================================
// DIUtilGetHIDDevice
//
// Helper function to get the file handle of the related HID device
// LPDIRECTINPUTDEVICE2 pdiDevice2 - ptr to device object
// PHANDLE hDriver - ptr to recieve device handle
// Returns: HRESULT
//
//===========================================================================
HRESULT DIUtilGetHIDDevice(LPDIRECTINPUTDEVICE2 pdiDevice2, HANDLE *hDriver)
{
HRESULT hRes = E_NOTIMPL;
DIPROPGUIDANDPATH dipgp;
// validate pointers
if( (IsBadReadPtr((void*)pdiDevice2, sizeof(IDirectInputDevice2))) ||
(IsBadWritePtr((void*)pdiDevice2, sizeof(IDirectInputDevice2))) )
{
ERROUT(TEXT("DIUtilGetHIDDevice() - invalid pdiDevice2\n"));
return E_POINTER;
}
// Initialize structure
dipgp.diph.dwSize = sizeof(DIPROPGUIDANDPATH);
dipgp.diph.dwHeaderSize = sizeof(DIPROPHEADER);
dipgp.diph.dwObj = 0;
dipgp.diph.dwHow = DIPH_DEVICE;
// Get the path
hRes = pdiDevice2->GetProperty(DIPROP_GUIDANDPATH, &dipgp.diph);
if(FAILED(hRes))
{
ERROUT(TEXT("DIUtilGetHIDDevice() - GetProperty() failed\n"));
return hRes;
}
*hDriver = CreateFile(dipgp.wszPath,
GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if(!hDriver)
{
ERROUT(TEXT("DIUtilGetHIDDevice() - Can't open device\n"));
return E_FAIL;
}
return hRes;
} //*** end DIUtilGetHIDDevice()
