Sound
PowerBASIC has only one function to create a sound, the function BEEP. There are no built-in function to play standard sound files (*.wav) nor midi files (*.mid).

Sounds

 beep

API
There are several Windows API which can be used to play sounds, including the sndPlaySound and WinBeep API.

Both of these are included in the Win32API.inc that is distributed with PowerBASIC, so the declaration statements do not need to be put in the application as long as the #INCLUDE "Win32API.inc" compiler directive is included.

Here is an example of using the WinBeep API.

    DECLARE FUNCTION WinBeep LIB "KERNEL32.DLL" ALIAS "Beep" _
            (BYVAL dwFreq AS DWORD, BYVAL dwDuration AS DWORD) AS LONG
    WinBeep 1000, 2000   'play 1000Hz sound for two seconds

And here are several sndPlaySound API example.

    Declare Function sndPlaySound Lib "winmm.dll" 
         Alias "sndPlaySoundA" (ByVal lpszSoundName As String,
         ByVal uFlags as Long) as Long
    Dim iReturn As Long, SoundFile As String
    SoundFile = "sound.wav"  'set filename of sound to play
    iReturn = sndPlaySound(SoundFile, &H1)  'once, in background
    iReturn = sndPlaySound(SoundFile, &H0)  'once, wait until done
    iReturn = sndPlaySound(SoundFile, &H8)  'play continuously
    iReturn = sndPlaySound(vbNullString, False) 'stop playing sound

Not shown here, the mciSendString API can be used to play midi files.

Controls
Unlike Visual Basic, PowerBASIC does not come with a built in control to play sounds. If the use of API, as discussed above, doesn't satisfy your need, you have two other choices.

3rd Party COM Control
Several vendors have created COM controls which can play sounds, either by providing a VCR-style interface for the user or by allowing the programmer to supply command strings to control the sounds generated by the control.
Control of Installed User Application
If you know a user has an installed sound player, such as the built-in Windows sound recorder, you can use PowerBASIC to start the application and play the sound.

Sound Function Reference
Here's a quick reference of the available sound functions, in alphabetical order.

BEEP - plays the Windows default beep sound

    Beep      'that's it, just one line of code to get a beep

Note that the default Windows sound can be changed using the control panel, or by using an API call.

If you have any suggestions or corrections, please let me know.