Using Win32 functions in Visual FoxPro Image Gallery
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GDI+: Storing content of the Clipboard to a bitmap file
Capturing keyboard activity of another application with the Raw Input API (VFP9)
Custom GDI+ class
How to convert a bitmap file to monochrome format (1 bpp)
Winsock: sending email messages (SMTP, port 25)
Windows Shell Icons displayed and exported to ICO files (Vista)
Custom HttpRequest class (WinHTTP)
Mapping and disconnecting network drives
Printing Image File, programmatically set print page orientation to landscape
Using EnumPrinters function to enumerate locally installed printers
Using WM_COPYDATA for interprocess communication (VFP9)
Adding a background image to VFP report (VFP9, ReportListener)
Custom FTP Class for Visual FoxPro application
Using FoxTray ActiveX control: System Tray Icon and menu attached to VFP form
Enumerating MIDI output devices
HOWTO: Use the Win32 API to Access File Dates and Times
Creating the Open dialog box to specify the drive, directory, and name of a file to open
Accessing examples contained in this reference through Web Services
How to detect if additional monitor is connected and active
Detecting changes in connections to removable drives (VFP9)
Using Video Capture: displaying on FoxPro form frames and previewing video obtained from a digital camera
Displaying icons in the system tray (VFP9)
Enumerating MIDI output devices

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  • How to play MIDI notes
  • DO declare
    
    LOCAL nCount, nIndex, nBufsize, cBuffer
    
    nCount = midiOutGetNumDevs()
    FOR nIndex=0 TO nCount-1
        nBufsize = 1024
        cBuffer = REPLICATE(CHR(0), nBufsize)
    
        IF midiOutGetDevCaps(nIndex, @cBuffer, nBufsize) = 0
            LOCAL oMidiOutCaps As MIDIOUTCAPS
            oMidiOutCaps = CREATEOBJECT("MIDIOUTCAPS", cBuffer)
            ? oMidiOutCaps.szPname
        ENDIF
    NEXT
    * end of main
    
    PROCEDURE declare
        DECLARE INTEGER midiOutGetNumDevs IN Winmm
    
        DECLARE INTEGER midiOutOpen IN Winmm;
            INTEGER @lphmo, INTEGER uDeviceID, INTEGER dwCallback,;
            INTEGER dwCallbackInstance, INTEGER dwFlags
    
        DECLARE INTEGER midiOutClose IN Winmm INTEGER hmo  
    
        DECLARE INTEGER midiOutGetDevCaps IN Winmm;
            INTEGER uDeviceID, STRING @lpMidiOutCaps,;
            INTEGER cbMidiOutCaps
    
    DEFINE CLASS MIDIOUTCAPS As Session
    #DEFINE MAXPNAMELEN 32
        wMid=0
        wPid=0
        vDriverVersion=0
        szPname=""
        wTechnology=0
        wVoices=0
        wNotes=0
        wChannelMask=0
        dwSupport=0
    
    PROCEDURE Init(cBuffer)
        THIS.wMid = buf2word(SUBSTR(cBuffer, 1, 2))
        THIS.wPid = buf2word(SUBSTR(cBuffer, 3, 2))
        THIS.vDriverVersion = buf2dword(SUBSTR(cBuffer, 5, 4))
    
        THIS.szPname = SUBSTR(cBuffer, 9, MAXPNAMELEN) + CHR(0)
        THIS.szPname = SUBSTR(THIS.szPname, 1, AT(CHR(0),THIS.szPname)-1)
    
        THIS.wTechnology = buf2word(SUBSTR(cBuffer, MAXPNAMELEN+9, 2))
        THIS.wVoices = buf2word(SUBSTR(cBuffer, MAXPNAMELEN+11, 2))
        THIS.wNotes = buf2word(SUBSTR(cBuffer, MAXPNAMELEN+13, 2))
        THIS.wChannelMask = buf2word(SUBSTR(cBuffer, MAXPNAMELEN+15, 2))
        THIS.dwSupport = buf2dword(SUBSTR(cBuffer, MAXPNAMELEN+17, 4))
    
    ENDDEFINE
    
    FUNCTION buf2dword(cBuffer)
    RETURN Asc(SUBSTR(cBuffer, 1,1)) + ;
        BitLShift(Asc(SUBSTR(cBuffer, 2,1)),  8) +;
        BitLShift(Asc(SUBSTR(cBuffer, 3,1)), 16) +;
        BitLShift(Asc(SUBSTR(cBuffer, 4,1)), 24)
    
    FUNCTION buf2word(lcBuffer)
    RETURN Asc(SUBSTR(lcBuffer, 1,1)) + ;
           Asc(SUBSTR(lcBuffer, 2,1)) * 256
    
    
    

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    1903 bytes  
    Created: 2006-03-02 09:02:20  
    Modified: 2008-04-10 08:04:40  
    Visits in 7 days: 162  
    Listed functions:
    midiOutClose
    midiOutGetDevCaps
    midiOutGetNumDevs
    midiOutOpen
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