Joystick API

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Jack Russell - 04 Oct 2007 09:06 GMT

Can anyone give me an example of using joygetdevcaps and joygetposex in
vb.net. I have no problem in VB6 but get various exceptions, memory
violations in .net. I have (I think converted all the longs to integers
etc)

Thanks

Jack Russell

Reply to this Message

rowe_newsgroups - 04 Oct 2007 11:37 GMT

> Can anyone give me an example of using joygetdevcaps and joygetposex in
> vb.net. I have no problem in VB6 but get various exceptions, memory
[quoted text clipped - 4 lines]
>
> Jack Russell

Wow, surprisingly nothing show up for either function on pinvoke.net.
Perhaps you could post the API's so we could take a look at the
original, and your new declarations.

Thanks,

Seth Rowe

Reply to this Message

Jack Russell - 08 Oct 2007 01:26 GMT

>>Can anyone give me an example of using joygetdevcaps and joygetposex in
>>vb.net. I have no problem in VB6 but get various exceptions, memory
[quoted text clipped - 12 lines]
>
> Seth Rowe

Still struggling although have found I can make it work (VB6 needs the
structures passed by val, .net by ref).

However I need the following structure

Private Type JOYCAPS
wMid As Integer
wPid As Integer
szPname As String *32
wXmin As Long
wXmax As Long
wYmin As Long
wYmax As Long
wZmin As Long
wZmax As Long
wNumButtons As Long
wPeriodMin As Long
wPeriodMax As Long
End Type

How do I do the string in .net (I know to change the type to a
structure). The only way I have found is to pad it with integers
although strangely not to the length that I would have expected!

Reply to this Message

Armin Zingler - 08 Oct 2007 01:39 GMT

> rowe_newsgroups wrote:
> > On Oct 4, 4:06 am, Jack Russell <ja...@norubbish.tpg.com.au>
[quoted text clipped - 19 lines]
> Still struggling although have found I can make it work (VB6 needs
> the structures passed by val, .net by ref).

The API function needs them "ByRef", in VB6 as well as in VB.Net. If you
don't specify anything in VB6, it defaults to ByRef.

> However I need the following structure
>
[quoted text clipped - 16 lines]
> structure). The only way I have found is to pad it with integers
> although strangely not to the length that I would have expected!

What's your current VB.Net declaration?

Armin

Reply to this Message

Jack Russell - 08 Oct 2007 10:07 GMT

>> > On Oct 4, 4:06 am, Jack Russell <ja...@norubbish.tpg.com.au>
>> > wrote:
[quoted text clipped - 21 lines]
> The API function needs them "ByRef", in VB6 as well as in VB.Net. If you
> don't specify anything in VB6, it defaults to ByRef.

I agree with you, it is just that the sample program I found on the net
had them byval and it worked in VB^. Maybe VB6 is cleverer than we thought!

>> However I need the following structure
>>
[quoted text clipped - 20 lines]
>
> Armin

I got it to work after finding this in a sample program (unfortunately I
cannot get Help to tell me what it means).

<StructLayout(LayoutKind.Sequential)> _
Private Structure JOYCAPS
Dim wMid As Int16
Dim wPid As Int16
<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=32)> _
Dim szPname As String ' * MAXPNAMELEN
Dim wXmin As Integer
Dim wXmax As Integer
Dim wYmin As Integer
Dim wYmax As Integer
Dim wZmin As Integer
Dim wZmax As Integer
Dim wNumButtons As Integer
Dim wPeriodMin As Integer
Dim wPeriodMax As Integer
End Structure

Reply to this Message

Spam Catcher - 04 Oct 2007 19:51 GMT

Jack Russell <jackr@norubbish.tpg.com.au> wrote in news:O4HMq1lBIHA.3848
@TK2MSFTNGP05.phx.gbl:

> Can anyone give me an example of using joygetdevcaps and joygetposex in
> vb.net. I have no problem in VB6 but get various exceptions, memory
> violations in .net. I have (I think converted all the longs to integers
> etc)

Have you taken a look at managed direct x? You could try using DirectInput?

Reply to this Message

Jack Russell - 04 Oct 2007 21:19 GMT

> Jack Russell <jackr@norubbish.tpg.com.au> wrote in news:O4HMq1lBIHA.3848
> @TK2MSFTNGP05.phx.gbl:
[quoted text clipped - 5 lines]
>
> Have you taken a look at managed direct x? You could try using DirectInput?

I am using Express versions which I understand do not support Direct X

Jack Russell

Reply to this Message

Spam Catcher - 04 Oct 2007 21:51 GMT

Jack Russell <jackr@norubbish.tpg.com.au> wrote in news:OHsBZPsBIHA.912
@TK2MSFTNGP05.phx.gbl:

> I am using Express versions which I understand do not support Direct X

DirectX is an additional download. The Managed SDK is inside the SDK along
with associated documentation and samples.

Reply to this Message

Jack Russell - 05 Oct 2007 01:00 GMT

> Jack Russell <jackr@norubbish.tpg.com.au> wrote in news:OHsBZPsBIHA.912
> @TK2MSFTNGP05.phx.gbl:
[quoted text clipped - 3 lines]
> DirectX is an additional download. The Managed SDK is inside the SDK along
> with associated documentation and samples.

Thanks, I will take a look

Jack

Reply to this Message

Joystick API

Free Magazines