Problem with the WM_INPUT exemple

gmobile · Post by **gmobile** » Thu Sep 18, 2008 9:14 pm

Hi,

When i run your WM_INPUT exemple, GetRawInputData() fails on line 142 in WM_INPUTExample.cpp. The WM_INPUT method is the best way i can make use of a 3dx device in my application.

Is there a solution to this problem?

Thank you

Gabriel

Post by **jwick** » Fri Sep 19, 2008 9:47 am

Works for me.

What error are you getting?

Which device do you have connected?

What O/S, version, etc. are you running?

Did you make any modifications to the demo?

gmobile · Post by **gmobile** » Fri Sep 19, 2008 11:37 am

Hi,

I didn't make any modification to the code.
Im using the Space Navigator, O/S is Vista x64, and i compiled on VS2005.
GetRawInputData() returns -1 everytime I displace the cap.

I tried on Vista 32bit with the same hardware and its works. So i guess its a problem with the OS. Do you have any clue how i could fix that?

Much appreciated.

Gabriel

Post by **jwick** » Fri Sep 19, 2008 12:07 pm

Aha. I haven't tried that code on Win64.

Maybe RAWINPUTHEADER is a different size on Win64. You can call GetRawInputData with a null pointer to get the required size.

gmobile · Post by **gmobile** » Fri Sep 19, 2008 12:34 pm

You are right, of course, i just read :

"RAWINPUT is wrong (the fieldoffset(16)) because it wrongly assumes RAWINPUTHEADER being 16 bytes long on all platforms, while may be correct on 32 bit, it's 24 bytes on 64 bit. "

I'll try this as soon as i get home.

Thanks you

Post by **jwick** » Fri Sep 19, 2008 12:41 pm

For everyone's information, the referenced link:

http://social.msdn.microsoft.com/forums ... 4947f4a009

Isn't the web a wonderful thing?!