Hi,

I have a problem.
I need to use mciSendString in my next TBGL tutorial to play multiple sounds at once.

All works perfect, until I bind the UI module.

This code works:
  DECLARE FUNCTION mciSendString    LIB "WINMM.DLL"     ALIAS "mciSendStringA"    (lpstrCommand AS DWORD, lpstrReturnString AS DWORD, BYVAL uReturnLength AS DWORD, BYVAL hwndCallback AS DWORD) AS LONG


  sndOperate ("Open c:\windows\media\tada.wav")        
  sndOperate ("Play c:\windows\media\tada.wav")        
  SLEEP 1000
  sndOperate ("Close c:\windows\media\tada.wav")        
  
    
  ' Functions for sound handling
  FUNCTION sndOperate( sFile AS STRING ) AS LONG

    LOCAL Sound AS ASCIIZ * 255

    Sound = sFile
    mciSendString(STRPTR(Sound), NULL, NULL, NULL)

  END FUNCTION
But this, although almost the same ... not :
  USES "UI"

  DECLARE FUNCTION mciSendString    LIB "WINMM.DLL"     ALIAS "mciSendStringA"    (lpstrCommand AS DWORD, lpstrReturnString AS DWORD, BYVAL uReturnLength AS DWORD, BYVAL hwndCallback AS DWORD) AS LONG


  sndOperate ("Open c:\windows\media\tada.wav")        
  sndOperate ("Play c:\windows\media\tada.wav")        
  SLEEP 1000
  sndOperate ("Close c:\windows\media\tada.wav")        
  
    
  ' Functions for sound handling
  FUNCTION sndOperate( sFile AS STRING ) AS LONG

    LOCAL Sound AS ASCIIZ * 255

    Sound = sFile
    mciSendString(STRPTR(Sound), NULL, NULL, NULL)

  END FUNCTION
Any ideas ?

Thanks,
Petr