OpenEuphoria

Re: Win32Lib: PlaySound parameters

• Posted by Dan Moyer <DanMoyer at PRODIGY.NET> Nov 02, 1999
• 508 views

David,

Yeah, that will probably at least let me experiment with the SND_NOSTOP
flag in a test-if-finished loop for individual instances of playSound async.

Thanks.

Dan Moyer

On Tue, 2 Nov 1999 08:43:12 -0800, David Cuny <dcuny at LANSET.COM> wrote:

>Dan Moyer wrote:
>
>> I understand almost nothing about the API wrapping, so
>> is there anything  that can be done here to make use of
>> the PlaySound FUNCTION??
>
>I didn't have any documentation for the PlaySound function, so I just
>filched the code from a demo of Robert's. Robert declared the routine as a
>procedure, and so that's what I did as well.
>
>The 'A' and 'W' at the end of the function name designate if the routine
>takes as ANSI string (1 byte per character) or a Unicode (W=wide=2 bytes
per
>character). If there is no 'A' or 'W', the 'A' is probably assumed.
>
>In C, all routines return a value - even if it's just NULL. If you don't
use
>the value returned by the routine; i.e.:
>
>    foo( bar )
>
>then the C compiler just discards the result. So the distinction that
>Euphoria makes between a C procedure and function is a bit artificial.
>
>To convert the PlaySound call into a function, use define_c_func() instead
>of define_c_proc(), (for Win32Lib, use linkFunc and linkProc) and specify
>the type of value the routine returns (C_INT, C_LONG, C_POINTER, etc.). The
>prototype would look something like this:
>
>   xPlaySound = linkFunc( winmm, "PlaySoundA", {C_INT, C_INT, C_INT},
>C_INT )
>
>Hope this helps!
>
>-- David Cuny